Alteration of plate of S. Augustus Mitchell.; Copyright of 1850 but with references to 1851 in label inside cover.; Table inside cover gives population of counties in 1850. 32 x 41 centimeters Scale approximately 1:2,000,000 Scales of insets vary. General Map Collection
Publisher:
Thomas, Cowperthwait & Co., no. 253 Market Street (Philadelphia)
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