Last page of a 5 page document. The map is a topographical map marked with early post offices (with dates) and mail routes in McNab Twp and some of Lanark and Carleton counties. The marked post offices are Perth, Franktown, Fitzroy Harbour, Castleford, Renfrew, McNab, White Lake, Pakenham, and Smith Falls.
This map is part of the 5 page article by Ed Manchee titled "A Stage in the Development of Postal Service in Renfrew County." McNab Post Office was at Canaan, between Burnstown and Renfrew.