1850. Thomas, Cowperthwait & Co. Washington prime meridian. "Entered according to Act of Congress, in the year 1850, by Thomas, Cowperthwait & Co., in the clerks Office of the Di... Thomas, Cowperthwait & Co. (Philadelphia), 1850.
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1850. Mitchell, S. Augustus (Samuel Augustus), 1792-1868 and Thomas, Cowperthwait & Co. Washington prime meridian. "Entered according to Act of Congress, in the year 1850, by Thomas, Cowperthwait & Co., in the clerks Office of the Dist...
1850. 1 map ; 43 x 56 cm., folded to 14 x 8 cm. Includes inset on North St. Joseph and St. Joseph. Shows plat of the city and locations of public buildin...
1850. [creator not identified]. Edges trimmed, possibly from a larger map showing railroads. Hand col. showing [geology?]. 1 map: col.; 28 x 25 cm.