- United States, Post Office Dept
- Digital Commonwealth
- Boston Public Library
- Post Office Dept
Shows counties, railroads, postal routes, delivery schedule, and discontinued post offices. Prime meridians: Washington, D.C. and Greenwich. Insets: Environs of Portland--Environs of Bangor. The service on this diagram brought up to date of October 1st. 1891. Published by order of Postmaster General John Wanamaker under the direction of C. Roeser, Jr.
Railway mail service--Maine--Maps
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