- John Provis, civil engineer: notebooks (6 vols) rel to work on Holyhead road and Menai bridge 1821-26
- Donald Hugh Baillie Reynolds, civil engineer papers rel to rainfall and well level readings on chalk of SE England, incl wells near the Channel Tunnel 1921-70
- Thomas Telford, civil engineer: letter to TE Lee rel to survey of the Birmingham and Liverpool Junction Canal 1832
- Coode Blizzard, consulting engineers, London: corresp, plans, reports and papers rel to harbour and navigation work in the UK, Africa and Asia 1856-1985
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