Skeleton map of the overland mail route to California.
Subtitle: Route adopted by the department traced in green. Route proposed by John Butterfield and others (who were the lowest bidders) in red.
Series: Western Americana, 1550-1900 -- reel 86, no. 859.
Published: 1857
Place of publication: [N.p
Language: eng
Format: Microform
Subjects: Postal service -- United States -- Maps.
Genres: Maps.
Notes: Microfilm. New Haven, Conn. : Research Publications, 1975. -- 1 reel ; 35 mm. -- (Western Americana : frontier history of the Trans-Mississippi West, 1550-1900 ; reel 86, no. 859)