Map of the mail coach roads between London and Holyhead. The lines copied from Arrowsmith's map of England; the distances taken from Cary's book of roads. Measured from the post office / 
Arrowsmith, Aaron.
[London] :  House of Commons, 
1817.
In: House of Commons Papers. Session 1817. Vol. 3. Fifth Report ... on the roads from Holyhead to London, &c. Appendix, no. 6.