Great Western Railway, Paddington. Opened to Maidenhead, June 4th, 1838; to Twyford, July 1st, 1839; to Bristol, June 30th, 1841. The rate is on the broad gauge, and the engineer I. K. Brunel, Esq., son of Sir Isambert Brunel. The Box Tunnel on this line is 3168 yards in length.
Source: A Handbook for London, Past and Present. Peter Cunningham. Published by John Murray 1849.