| Description | Letter from Isambard Kingdom Brunel forwarding information and plans about the railway works in progress under his direction: these include the Great Western Railway; the Cheltenham and Great Western Union Railway; the Bristol and Exeter Railway; the Taff Vale Railway; and the Merthyr and Cardiff Railway. Topics covered include inclined planes and gradients, gauges of rails, locomotives, carriage wheels, plans, and estimates of costs and revenue. |