1. The National Archives (TNA), RAIL 267/30, Report on Advertising Department for Half-Year 31st January 1876.
2. TNA, ZPER 38/6, Great Western Railway (London): Lecture and Debating Society Proceedings 1908–1909.
3. TNA RAIL 250/772: GWR Minutes and Reports 1936.
4. Holiday Haunts. London: Great Western Railway, multiple editions.
5. Brett Young, Francis. Portrait of Clare. London: William Heinemann, 1927.