Ferneyhough 1980, p. 44. Ferneyhough, Frank (1980). Liverpool & Manchester Railway 1830–1980. England: Book Club Associates. OCLC656128257.
Carlson 1969, p. 219. Carlson, Robert Eugene (1969). The Liverpool and Manchester Railway Project 1821–1831. Newton Abbot: David and Charles. ISBN0-7153-4646-6. OCLC832435892.