- United States, Post Office Department
- Digital Commonwealth
- Boston Public Library
- The Department
Shows counties, railroads, postal routes of various frequencies, special supply routes, and mail messenger routes. Relief shown by hachures. Insets: Environs of Denver--Cripple Creek and Colorado City. Includes list of counties. Published by order of Postmaster General James A. Gary under the direction of A. von Haake, topographer, P.O. Dept.
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