J.C. Sidney C.E., author of 12 miles around New York. 1 map on 4 sheets : hand col. ; 141 x 102 cm., sheets 76 x 52 cm. Scale [1:50,700]. Scale 1 1/4 inches to 1 mile. Relief shown by hachures. Shows landowners names. "Entered according to the Act of Congress in the year 1850 by Robert P. Smit[h ...]ce of the district court for the Eastern District of Pennsylvania." Includes text, ill., and statistical table of Dutchess County. Inset: Plan of Poughkeepsie.