Post Office : return to an order of the Honourable The House of Commons, dated 9 March 1847 ; [a return of the gross and net receipt of the revenue of the Post Office, the cost of management, &c., for the year 1846]

Post Office : return to an order of the Honourable The House of Commons, dated 2 April 1844 ; [returns of the number of chargeable letters which have passed through the London General Post-Office since 5th December 1839, together with other returns on the subject of postage]

Hawes, ..., (1844)

Commercial returns in a mail order company: the Wehkamp case

de Koster, René M. B., (2005)

Getting the message : story of the British post office

Browne, Christopher, (1993)