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The iron slip cover roofs of Deptford and Woolwich Royal Dockyards 1844-1855

Duncan Hawkins and Caroline Butler with Andrew Skelton

Introduction

The period 1844 to 1857 saw the erection of eighteen revolutionary widespan iron buildings in the Royal Dockyards of Chatham, Deptford, Pembroke, Portsmouth and Woolwich. 1 Constructed of cast and wrought iron frames and roofs and clad with corrugated galvanised iron (CGI), the buildings served as roofs to Dockyard slipways. The design brief was set by officers of the Royal Engineers, but all detailed design, fabrication and construction was by three of the leading contractors of their day, Fox Henderson, George Baker and Son and Grissells.

Three of these slip cover roofs were built at Deptford Dockyard (Slips 1, 2 and 3) and three at Woolwich Dockyard (Slips 4, 5 and 6). Of the surviving buildings, two are located at Chatham, having been originally built as slip cover roofs at Woolwich then dismantled and re-erected at Chatham as Machine Shop No. 8 and the Boilershop after 1869. The remaining (much altered) building is the Olympia Warehouse (formerly Slips 2 and 3), Convoys Wharf, Deptford, on the site of the former Deptford Dockyard.

The wooden slip cover roofs: 1814-1841

Wooden warships could remain under construction for many years, leading to significant problems with rot prior to launch. 2 By 1812 the Admiralty was considering roofing slipways and docks to alleviate this. The first slip cover roofs in Britain may have been built in 1812/13. 3 However, the first documented covered slips were at Deptford, Portsmouth, Plymouth, and Woolwich by 1814. 4, 5, 6 From 1814 to 1841 the slip cover roofs were framed in timber. They were clad initially with boarding and tarred canvas or paper, with slate from c.1817 but with copper or zinc by 1819. 7, 8 The last wooden slip cover roof constructed was over Slip No. 3 at Pembroke in 1841 which cost £7,500. 9

An evocative 1847 description of the 1841 wooden slip cover roof at Pembroke No. 3 Slip survives:

Examination of the design of wooden slip cover roofs indicates that these were not limited in span or scale compared with their iron successors. 11, 12, 13 The scale and sophistication of these buildings is shown in contemporary images (Fig. 1).

The imperatives to discard timber construction in favour of iron

The replacement of timber with iron in slip cover roofs may in part have been due to durability and maintenance. The cumulative cost of construction and subsequent maintenance of wooden roofs was significant. At Chatham in 1816 the estimated cost for building a wooden 'roof' over the 'first dock and second slip' was £11,650 but the 'second slip' appears again in the estimates for 1818, when roofing it cost £3,000. This appears to have excluded the copper sheathing, for which a comparable sum of £2,635 is available in the estimates for the 'first slip'. 14 Overall therefore the cost of providing the wooden cover roofs over the 'first dock and second slip' at Chatham was perhaps c. £17,285. By comparison the earliest iron slip cover roofs over slips Nos. 8 and 9 at Pembroke Dockyard cost £15,480. 15

Additionally the lighter iron slip cover roofs required significantly fewer supporting columns (standards) than their wooden predecessors, allowing more efficient use of the covered space within the building.

Many of the wooden slip cover roofs suffered significantly from rot. In 1844 it was reported that the wooden roofs over slip Nos. 8 and 9 at Pembroke were totally decayed. 16

The principal imperative for replacing timber with iron, however, was to eliminate the risk of fire. In 1845 (published 1847), Williams observed:

An illuminating text describes working conditions under a wooden slip cover roof at Devonport Dockyard recording that the men working on the future HMS Albion:

The potential fire risk of this practice is scarcely calculable.

The first iron slip cover roofs: 1844-1845

Fireproof slip cover roofs were first proposed by Sir Samuel Bentham in 1812 for modifications at Sheerness Dockyard, though Bentham's proposals envisaged masonry walls and cast iron roofs and were never implemented. 19 In 1837 Captain Henry Brandreth, Royal Engineers (1794-1848) was appointed Director of Admiralty Works and the topic was reviewed again. His obituary records:

As Director of Admiralty Works from 1837 to 1846, Brandreth was an advocate of iron construction. 21 In 1837 Brandreth formed a team of (then) Junior RE Officers who were made Supervisory Officers for the Admiralty Works in the Royal Dockyards (Table 1).

The experience of these officers with iron as a building medium appears variable. 22, 23 An indication of this is an 1843 paper by one of their number, William Denison:

This shows both that the Royal Engineers were unfamiliar with this type of iron roof construction, and that Denison was reliant on civilian roof fabricators and contractors for technical details.

=============TABLE ==============

How early Brandreth was pursuing the aim of creating iron slip cover roofs is unclear, but a surviving document of 1840 in relation to Pembroke Dockyard refers to 'Fireproof roofs for slips. Mr William Potter proposes a plan, to send plan and estimate'. 25 Potter was perhaps a civilian contractor or a civilian member of the Admiralty Works Department. An intriguing possibility is that the concept of the all iron slip cover roofs, as eventually implemented, may actually have its origins in these proposals, put forward by a civilian.

In May 1842 the Admiralty directed that all new slip cover roofs were to be constructed of iron. 26

Brandreth drew up a dimensional sketch drawing to show how his standardised slip cover roof might work (Fig. 2), and for the Shipwrights to comment on. The advantages of standardising the dimensions to facilitate design, manufacture (particularly prefabrication), and budgeting projects can be readily understood.

Most of the Shipwrights agreed with Brandreth's proposals. However, there was significant dissention from the Shipwrights at Pembroke Dockyard:

Brandreth also noted that the Pembroke Shipwrights objected to the distance intervals of the standards along the slips proposed at 13' 4", preferring a distance of 'about 11 feet' 29 noting also that:

That the Pembroke Shipwrights submitted an alternative sketch proposal to Brandreth's is noteworthy. Consequently Brandreth proposed:

After further correspondence the Pembroke Shipwrights won most of their arguments. Brandreth's concession to the Shipwrights, compromising the opportunity to create a standard class of buildings to a pre-designed format suitable for pre-fabrication must surely be seen in the context of his documented ill health, which affected him from 1841 and forced his retirement in 1846. 32

The first timber slip roofs selected for replacement were those over the adjoining slips Nos. 8 and 9 at Pembroke Dockyard, the timber structures being totally decayed.

Williams records that:

The fact that supervision of the buildings' construction was left to Fox Henderson's own consultant John D'Urban Hughes (1807-1874), an experienced railway and bridge engineer, is significant, showing there was no direct supervisory role for the Royal Engineers. As such, it reflected the Royal Engineers' lack of experience with iron roofs as indicated in William Denison's 1843 paper, with the Royal Engineers only responsible for directional control.

Williams, the Supervisory Royal Engineer Officer at Pembroke Dockyard at the time of the roofs' construction, 34 provides a complete description of the new Pembroke slip cover roofs and their erection concluding that the design and construction:

Evans' statement that 'The two slip roofs … are the only ones to which a designer, rather than a contractor, can be definitely attributed' 36 must therefore be judged in terms of the Royal Engineers' own contemporary statement on who had principally contributed to the new buildings.

Fox Henderson's new iron roofs to Slips Nos. 8 and 9 at Pembroke Dockyard, together with a further new iron roof to Slip No. 7 at Pembroke of c.1845 owed much in form and design to Seppings' earlier wooden roofs. 37, 38 In essence it was the fabric of the material components that had changed rather than the principles of roof construction, with iron components being substituted for the wooden components of the earlier buildings.

Tucker observed: 'in form they resembled Robert Seppings' timber ship sheds, but using wrought iron arched principals comprised, in effect, of overlapping polonceau trusses, between cast iron pillars'. 39

Woolwich Slip Cover Roof No. 6: c.1845

Fox Henderson appear to have carried out a similar 'design and build' role at Woolwich Dockyard in 1844-45 where they were commissioned to produce an iron roof to Slip No. 6. The most up to date review of that dockyard's architecture states that this building was 'Designed and fabricated by Fox, Henderson and Co'. 40

This structure was again close in form to Seppings' timber precursors and very similar to the Pembroke Slip Roofs Nos. 7, 8 and 9, 41, 42 using almost identical components, very slightly reduced in scale from those used at Pembroke (Figs. 3 to 6).

The assertion that Roger Stewart Beatson, the supervisory officer of the Royal Engineers at Woolwich from 1845 had designed the cover roof of Slip No. 6 43 appears incorrect, though his predecessor William Thomas Denison may well have specified the dimensions. This building still survives today in skeletal form as Machine Shop No. 8 Chatham Dockyard.

By the close of 1845, Fox Henderson had erected four iron slip roofs (Pembroke Nos. 7, 8 and 9 and Woolwich No. 6), the design and fabrication of which it can be surmised had been carried out by them 'in house' (perhaps with the assistance of external civilian consulting engineers), as 'design and build' contracts based on the latest wooden slip covers designed by Sir Robert Seppings. The erection of the first two roofs at Pembroke had certainly been supervised by Fox Henderson's consulting engineer, John D'Urban Hughes.

In all cases the new iron slip cover buildings combined cast and wrought iron components. The types of component that were made from cast and wrought iron were determined by the methods of manufacture and shaping as well as the physical properties of the material. Typically cast iron is represented as massive columns, frames and beams and wrought iron as built up composites of relatively small components.

Where the iron slip cover buildings of the Royal Dockyards radically departed from contemporary factory, warehouse and railway construction practice was in the adoption of corrugated galvanised iron (CGI) as both a wall cladding and roofing material. CGI had been patented on 30 June 1829 by Henry Robinson Palmer, architect and engineer to the London Dock Company 44, 45 and by 1833 had been used in roofs for the London Dock Company warehouses. 46

Competitive contractors: Baker and Sons

The next iron roofs commissioned were built at Deptford Dockyard over Slip No. 1 and Slips 2 and 3 in 1844-5 47and at Portsmouth Dockyard over Slips Nos. 3 and 4 from September 1845. 48 These were by George Baker and Son of Lambeth. In September 1845 Denison at Portsmouth sent 'drawings of the explanation of this roof and proposed method of closing in the gables and states that Mr Baker's estimates are fair'. 49

A Goad insurance plan from 1889 shows the area of Baker's works as a small, elongated yard with two central buildings, both stores (but one containing a furnace), surrounded by ranges around all four sides. These ranges included a small smithery with two forges and an extensive range of carpenters' shops (Fig. 7).

Although there are no records directly relating to the occupation of the site by the Bakers, the compact nature and suburban setting of the site make it highly unlikely that the Bakers actually made any of the cast or wrought-iron components they used in the Admiralty contracts on these premises. Clearly they sub-contracted this part of their work out. Unfortunately it is now unknown with whom most of these sub contracts were placed, though it is known that Morewood and Rogers supplied CGI and galvanized angle iron for the iron slip cover roof to No. 5 slip at Portsmouth 50, 51 and the ironwork for the Natural History Museum was sourced from Belgium. 52 Bakers' roofs were quite different in form to the early Fox Henderson roofs, most notably in the greater use of cast iron and the much greater spacing of the frames – up to 30' (9.14m) as opposed to 12' 6" (3.81m) — transferring the load from the CGI sheeting to the frames through extremely light trussed purlins. It was in the design of the latter that the only certain evidence for the involvement of the Royal Engineers in these buildings' detailed design is identifiable. Following experiments on the breaking weight of the purlins these were found to fail with a pressure of 7,410lb when 7,980lb was required:

A complete technical description of the Baker Roofs over No. 3 and No. 4 slips at Portsmouth survives. 54

Deptford Dockyard Slip Roofs Nos. 1-3: 1844-1845

Deptford Dockyard Slip Roof No. 1 was built in 1844-5, 55 with completion occurring on 23 May 1845. 56 Unfortunately this roof was completely demolished following the closure of the Dockyard, and it is known now only from an engraving of c.1869 (Fig. 8) and from its foundation piers recorded during large scale archaeological excavations in 2011-2012.

The contract for constructing the iron slip cover roofs over Slips 2 and 3 in Deptford Dockyard (now the Olympia warehouse) appears to have been signed in October 1844. The building appears to have been erected in c.1844. The earliest illustration of the building is an engraving of c.1869 (Fig. 8). Subsequently, the roof of the building appears to have failed in the 1890s and been largely rebuilt.

The single internal area of 15,328' 1" (4,672m) comprises of an oblong 246' (75m) wide (east to west) by 203' (62m) deep (north to south) rising to a height of 56' 5" (17m) at its peak with (now) 33' 9" (10m) clearance in the main bays and 18' (5.5m) high at the eaves. Archaeological evaluation trial trenching in 2010 revealed the existing floor level to be 1m (3' 3") higher than in 1845. The original roof constructs were supported on cast iron I columns (Fig. 9) with flat capitals (totalling 24 in three rows of eight with three columns embedded in each of the end walls) and comprised two wide central bays 91'10" x 203'5" (28m x 62m) which covered the two slipways together with narrower side aisles 29' 6" x 203' 5" (9m x 62m) to the east and west to form covered working areas. The roofs and upper walls of the bays were originally wholly finished in CGI cladding. The upper walls of the north and south elevations are still clad in this material, though it is uncertain how much, if any, of this fabric is now original. Each of the north and south elevation upper walls were lit by windows. The engraving of c.1869 suggests that each end wall was lit by twelve windows (five upper and seven lower) whereas today the south elevation is lit by ten windows (four upper and six lower) and the north elevation by nine windows (four upper and five lower).

A photograph of c.1871 (Fig. 10) shows four upper windows plus a further blocked window and seven lower windows to each bay of the north elevation and it can be concluded that while the existing windows are probably original, two windows (one upper and one lower) have been blocked in each of the south elevations and three windows (one upper and two lower) have been blocked in each of the north elevations. The c.1871 photograph shows a further fourteen windows in the lower removable screens of the north elevation. These screens were taken down during ship launches.

The form of the building's roof has now been completely altered and originally was steeply pitched as is shown in the engraving of 1869 and the surviving Baker roofs at Chatham (Fig. 11). This is also clearly indicated in the internal photograph of c.1871 (Fig. 10).

As is shown in a photograph of pre-c.1913 (Fig. 12), the roof framing of the two central bays was replaced with a wrought iron tied arch roof 57 with riveted plate gussets. 58 The latticed trusses of the replacement roof are approximately 4' 11" (1.5m) at the apex, widening to 6' 7" (2m) at the supports. The context of this rebuild may be the conversion of the Dockyard to the Foreign Cattle Market in 1871 by Sir Horace Jones (1819-1887) but the photographic evidence (Fig. 10) might suggest otherwise. 59

However, the spans to the aisles and longitudinal bracing are largely original and closely match those observed in Slips 4, 5 and 6 at Chatham Dockyard. The cantilevered trusses to the side aisles are made from single castings with a straight top, curved lower boom and uneven pattern of lattice work. These trusses now rest on a steel wall plate resting on steel posts set in the outer walls.

Eleven angle/T section purlins span between the trusses in the central bays, three over the side aisles. Fourteen out of twenty-one original haunched longitudinal trusses remain, some 4-4.3m high. These have a ribbed lower flange, cast iron struts and wrought iron tie rods. The external appearance of the roof as originally rebuilt is shown in a photograph of 1947 (Fig. 13). Subsequently the roof cover has been entirely replaced.

The four lower sides of the building were originally completely open as is shown in the c.1869 engraving. Subsequently the south, west and north sides have been bricked up (the west possibly in part by c.1913 and the remainder by 1982 but with more recent rebuilds and additions). The cladding of the east side is in a modern profiled sheet metal fabric which also now forms the roofing material. Internally four cast iron wind braces are attached to the north and south walls; these are curved and include wrought iron elements.

Direct observation by the author of the surviving Baker roofs (Deptford Slips Nos. 2 and 3, Chatham Slips Nos. 4, 5 and 6) and the surviving drawings of all their slip cover roofs, including the preliminary unexecuted versions (Figs. 14 and 15), show these to form a distinct 'family group', with common design traits, standardised prefabricated parts, and little indication of any evolution in design over the two year period in which they were constructed. The surviving Baker roofs are recognisable as the work of one design team despite the severe mutilation of the Deptford example. Unfortunately the names of the civilian designers of these roofs are now unknown. 60

As well as the advantage in frame spacing enjoyed by the Baker roofs over the first four roofs constructed by Fox Henderson, there was another advantage; each pair of Baker roofs cost approximately £1,000 less than each pair of Fox Henderson roofs. 61, 62

Woolwich No. 4: the last contractor-designed slip cover roof?

After 1847 Baker and Sons were to receive no more new commissions for iron slip cover roofs following a near disaster in the construction of the Chatham roofs, though this was unrelated to the quality of the roofs themselves. 63

Fox Henderson however was to receive a commission for a further slip cover roof over No. 4 slip in Woolwich Dockyard. All discussions on the contract appear to have been managed by the Admiralty Works Department's civilian Architect William Scamp rather than Royal Engineers Superintendent Beatson. 64

The new slip cover roof was erected in 1847-8 and introduced an apparently completely new design devised for Fox Henderson by Edward Alfred Cowper (1819-1893) who had joined Bramah Fox in 1841. 65 Cowper stayed with the company until 1851 becoming Chief Designer and draughtsman under Fox. Cowper was to use his drawings of slip cover roof No. 4 at Woolwich Dockyard as a demonstration of the principle behind his design for the iron and glass roof of Birmingham New Street station which had a span of 212' (64.6m) and length of 840' (256m). 66

However, surviving photographs of Deptford Dockyard of c.1871 indicate that there was a wooden slip cover roof over Slip No. 5 of very similar form to the iron Woolwich slip cover roof No. 4, at least as viewed from the south east (Fig. 16; see also Reference 4, Fig. 5.14, p.100). This stood alongside and to the east of a more traditional wooden slip cover roof (Deptford No. 4), similar to the surviving Chatham slip cover roof No. 3.

The dimensions in plan of the wooden roof over Deptford No. 5 slip were 240' (73.15m) by 82' (25m) for the central span. These were recorded during a large scale archaeological excavation in 2011-2012. The evidence suggests it is possible that the wooden slip cover roof to Deptford slip No. 5 served as a model for Woolwich slip cover roof No. 4. This is consistent with Fox Henderson's approach to design on their earlier roofs, which were all based on wooden originals.

Slip cover roof No. 4 at Woolwich comprised a twelve frame building and was on a significantly greater scale than Fox Henderson's four earlier slip cover buildings, measuring 312' (95.1m) by 144' (43.9m) with a clear central span of 86' (26.2m) with the central space having a headroom of 58' (17.7m). The original 1847 portal frame was a structure of two tiers of roof with high level clerestory windows, louvres and a raised central lantern. In the construction of its frame it was a sophisticated and significant departure, using rigid framing or bracing through stiff joints. Cast iron framed aisles buttressed the tall nave, with wrought iron roof trusses incorporating tapered open work struts, possibly the first use of this type of iron component.

Again the detailed design and execution of this building was entirely Fox Henderson's. However, at £17,000 the cost of the building was more than that of the company's two first slip cover roofs at Pembroke, with the final cost representing an approximate 33% increase on the original estimate. This building still survives as 'The Boilershop' now converted into a retail outlet as part of the new Chatham Dockside complex (Fig. 17). 67

The final iron slip cover roofs: 1852-1858

By 1848 sixteen iron slip cover roofs had been constructed, of three basic designs with the most technically advanced being Fox Henderson's No. 4 slip cover roof at Woolwich Dockyard. No new slip cover roofs were built for four years. In 1850 Godfrey Thomas Greene (1807-1886), a retired Honourable East India Company Army Engineer, was appointed Director of Admiralty Works. In 1852 Greene, together with his assistant William Scamp completed the drawings for slip cover roof No. 7 at Chatham Dockyard. Drawings with specifications for this building were signed by Greene on 16 July 1852. 68 The design rather than being wholly new drew heavily on Fox Henderson's No. 4 slip cover roof at Woolwich, which as we have seen may have been inspired by the wooden No. 5 slip cover roof at Deptford.

In September 1852 Greene invited tenders and the contract to construct the building was won by 'Henry Grissell and Martin de la Garde Grissell of Regents Canal Iron works, … City Road, Engineers and Co Partners'. 69 Henry Grissell (1817-1883) and his brother Martin founded the Regents Canal Ironworks, Eagle Wharf Road, Hoxton in 1841. The works was located on the south side of the canal toward the City Road which is sometimes given as their address. Henry Grissell had been an apprentice and then assistant of John Joseph Bramah; he was noted for his technical knowledge and the Regents Canal Ironworks was noted as a 'test bed' for experimental ironwork. Although the design of slip cover roof No. 7 at Chatham has been ascribed to Greene and his Director's Office design team, in fact, when compared with Grissell's Sheerness Smithery of 1855-6 (now lost but recorded in a photograph of 1956) 70 and the surviving Sheerness Boat Store by Grissells' it is clearly part of a 'family' of buildings, which can be attributed to Grissell.

Although there is no documentary or drawn evidence to support it, there must have been extensive preliminary discussions between Greene and his design team with the subsequent building contractors before the design drawings for the building were finalised. This would fit well with Greene's approach to tendering in which only selected contractors, principally Fox Henderson and Grissell, were awarded contracts while others such as the Bakers were excluded. The implications are that the design of this building, although executed under Greene's direction were, in fact, as much the product of the contractors as of Greene and his in-house design team.

The last iron slip cover roof was also 'designed' by Greene and was originally erected over Slip No. 5 at Woolwich. Authorised in 1856, it was erected in 1856-58 by Grissell's, extended 1859-60 and subsequently moved to Chatham after 1869. It has been subsequently demolished. This building closely paralleled slip cover roof No. 7 at Chatham but with minor changes of detail; the main trusses were simpler and the knee braces below the bracing beams in the side were omitted. The building was 290' (88m long), and spanned 142' (43m) overall with a centre span of 82' (25m). A travelling crane was incorporated. 71

Conclusions

The Deptford and Woolwich iron slip cover roofs represent a fascinating period of rapid technical change. The creation of the first iron slip cover roofs was driven by economy and safety concerns, particularly the risk of fire. Happily iron technology had already reached a level whereby in 1842 the Admiralty could dictate that all new slip cover roofs should be in iron.

During the dominance of the Admiralty Works department by the Royal Engineers it is apparent that the detailed building design of the iron slip roofs was wholly decentralised. This explains the complete divergence in design between the iron slip cover roofs executed by Fox Henderson and those by George Baker and Sons. The former were clearly based on the pre-existing wooden slip cover roofs while the later owed much to contemporary railway architecture. Neither owed very much to the Royal Engineers except the broadest of dimensional specifications, and some minor technical details, facts which the Royal Engineers fully acknowledged in contemporary papers.

As Weiler stated:

The deployment to the Royal Dockyards of the Royal Engineers as supervisory officers in 1837 was an economic measure in a period of financial retrenchment. It was not based on the possession by the Royal Engineers of superior technical skills or experience in comparison with their civilian colleagues of the Admiralty Works Department, or of the civilian contractors engaged in iron construction. The skill sets amongst the Royal Engineers supervisory officers both as designers and project managers were variable, with Henry Brandreth being exceptional rather than typical. Ill health may well have prevented Brandreth from achieving significantly more in the way of systemised prefabricated iron construction during his time as Director of Admiralty Works.

In the period 1837-1850 project direction was almost wholly decentralised, and iron buildings directly designed in detail by the Royal Engineers could prove failures, as with Roger Beatson's Boatstore No. 6 at Portsmouth, 73 while those designed in detail by civilian contractors were largely successful. The most significant iron buildings constructed in the Royal Dockyards 1844-1848, the slip cover roofs, may have been conceived by a civilian contractor in 1840 and all of the detailed designs were by civilian contractors.

Only from 1850, as the role of the Royal Engineers in the Royal Dockyards declined, did a regime of centralised planning, project management and building design re-emerge under Godfrey Greene. The patronage by Greene of favoured contractors, in particular Fox Henderson (to 1856) and Grissell meant that their influence on building design was profound if understated. Research and fieldwork indicate that the majority of the buildings 'designed' by Greene can actually be attributed according to their civilian contractor, or other civilian designer.

The authors

Andrew Skelton BA ACIfA is a part time archaeologist and historian. Andrew is a co-author of a paper on Deptford Dockyard and a contributor to a paper on the Forge, Millwall and Paynes and Borthwick Wharves, Deptford.

Caroline Butler BA MSc ACIfA is an archaeological and heritage consultant and is currently advising on proposals to redevelop the former Royal Dockyard at Deptford.

Duncan Hawkins BA (Hons), MSc, FSA, MCIfA is a company director and archaeological and heritage consultant. He is currently advising on proposals to redevelop the former Royal Dockyard at Deptford. Former projects include work on various parts of Chatham Dockyard, the site of the East India Company's Deptford Dockyard, The Forge, Millwall, and Penn and Son's Boilerworks at Paynes and Borthwick Wharves, Deptford. Duncan is a co-author of a paper on Deptford Dockyard and co-author of a paper on the Forge, Millwall and Paynes and Borthwick Wharves, Deptford.

Notes and references

1. Sutherland, R J M (ed) 1997. 'Shipbuilding and the Long Span Roof in Sutherland Structural Iron 1750-1850 studies' in History of Civil Engineering, Volume 9, p 133 Table 1

2. Lambert, A 1991. The Last Sailing Battlefleet, Maintaining Naval Mastery, 1815-1850. Conway Maritime Press Ltd, London pp 37, 118-123

3. Sutherland, R J M 1997 op cit, p 127

4. Coad, J G 1989. The Royal Dockyards 1690-1850, p 110

5. Coad, J G 2013. Support for the Fleet Architecture and Engineering of the Royal Navy's Bases, 1700-1914. English Heritage, Swindon, pp 99-100, 110

6. Evans, D 2004. Building the Steam Navy. Dockyards, Technology and the creation of the Victorian Battle Fleet 1830-1906. Conway Maritime Press, London, p 44

7. Coad, J G 1989 op cit, p 112

8. Sutherland, R J M 1997 op cit, p 131

9. Evans, D 2004 op cit, p 44

10. Williams, M 1847. 'Description of Wrought Iron Roofs erected over two building slips in the Royal Dockyard, Pembroke'. In Papers on subjects connected with the duties of the Corps of Royal Engineers Vol IX, p 51

11. Ibid p.50-51, Plate XI

12. Coad, J G 1989 op cit, pp 110-115

13. Sutherland, R J M 1997 op cit, pp 127, 135 Fig. 7

14. Coad, J G 1989 op cit, p 112

15. Williams, M 1847 op cit, p 51

16. Sutherland, R J M 1997 op cit, p 131

17. Williams, M 1847 op cit, p 51

18. TNA, ADM 1/5521-1842

19. Sutherland, R J M 1997 op cit, p 126

20. Lewis, G G 1849. 'Memoir of Lieut. Col Brandreth'. In Papers on subjects connected with the duties of the Corps of Royal Engineers, Vol X, p 8

21. Thake, C 2011. William Scamp (1801-1872) an architect of the British Admiralty in Malta. Midsea Books Ltd, Malta p 51

22. Sutherland, R J M 1990. 'The Right to Survive'. In New Builder, Issue 34, May 1990, pp 28-9

23. Evans, D 2004 op cit, p 49, p 54

24. Denison, W T 1843. 'Description of some iron roofs created in different places'. In Papers on subjects connected with the duties of the Corps of Royal Engineers, Vol VI, p 211

25. TNA, ADM 12/370 24/10/1840

26. Coad, J 2013 op cit, p 188

27. Evans, D 2004 op cit, p 44

28. TNA, ADM 1/5521-1842

29. Ibid.

30. Ibid.

31. Ibid.

32. Thake, C 2011 op cit, p 46

33. Williams, M 1847 op cit, p 51

34. Sutherland, R J M 1997 op cit, p 132

35. Williams, M 1847 op cit, pp 51-58

36. Evans, D 2004 op cit, p 45

37. Williams, M 1847, Plates XI, 12, 14, 15, 16

38. Sutherland, R J M 1997 op cit, p 129 Fig. 3, p 134

39. Tucker M 2007. 'Structural Ironwork at Pembroke Dock. A microcosm of naval practice'. In Transactions of the Naval Dockyards Society Vol 3, November 2007, p 34

40. English Heritage, 2012. Survey of London. Vol 48: Woolwich, p 106

41. Ibid, pp 85-127

42. Sutherland, R J M 1997 op cit, p 134 Fig 5

43. Evans, D 2004 op cit, p 54

44. Dickinson, H W 1944. James Watt & the Industrial Revolution. Longmans Green & Co, London, pp 27-36

45. Thomson, N 2011. Corrugated Iron Buildings. Shire Publications, Oxford

46. Weiler, J M 1987. 'Army Architects, The Royal Engineers and the development of building technology in the nineteenth century'. PhD Thesis, University of York, p 161

47. TNA ADM 181/55/1844-45

48. Cumberland, F W 1847. 'Iron Roofs erected over Building Slips, No. 3 and No. 4, in Her Majesty's Dockyard, Portsmouth'. In Papers on subjects connected with the duties of the Corps of Royal Engineers, Vol IX (paper originally dated November 1846), p 59

49. TNA, ADM 12/444-23/9/1845

50. Evans, D 2004 op cit, p 75, Note 4

51. Llanelli History (2013) available at www.llanelli-history.co.uk/people_moorwood&rogers.htm. Last accessed 23 December 2013

52. Natural History Museum (2013) available at www.nhm.ac.uk. Last accessed 23 December 2013

53. Cumberland, F W 1847 op cit, p 64

54. Ibid, pp. 60-65, Plates 8 and 9

55. TNA ADM 181/55/1844-45

56. TNA ADM 12/444, 1845

57. Mott MacDonald 2010. 'Built Heritage Assessment, Convoys Wharf, Deptford' (Unpublished), p 19

58. Sutherland, R J M 1997 op cit, p 136

59. Horace Jones (architect): Wikipedia available at http://en.wikipedia.org/wiki/Horace_Jones

60. Skempton, A W (ed) 2003. Biographical Directory of Civil Engineers, Vol 1, 1500-1800, p 33

61. Williams, M 1847 op cit, p 51

62. Cumberland, F W 1847 op cit, p 65

63. Evans, D 2004 op cit, p 49

64. TNA, ADM 12/460-6/5/1846-24/12/1846

65. Coad, J 2013 op cit, p 192

66. Proceedings of the Institution of Civil Engineers, vol XV, 1855-56, p 264 ff

67. English Heritage, 2012 op cit, p 106

68. Weiler, J M 1987 op cit, p 156

69. NMM, CHA/H/88-506-21/9/1852

70. National Monuments Record (NMR) AA98/04626

71. English Heritage 2012 op cit, p 107

72. Weiler, J M 1987 op cit, p 129

73. Evans, D 2004 op cit, p 54


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