| Description | Letter from Isambard Kingdom Brunel to Adolph D'Eichtal regarding workings, traffic, routes and amalgamations on the Greenwich Railway, Croydon Railway, Brighton Railway, Dover Railway, Manchester & Leeds Railway, Liverpool & London Railway, Bolton & Leigh Railway, Lancaster & Preston Railway, Northern & Eastern Railway, Eastern Counties Railway, Bristol & Gloucester Railway, Great Western Railway, Cheltenham & Great Western Union Railway, Birmingham & Gloucester Railway |