Carey & HartPrime meridian: Washington. Below scale: Published by Carey & Hart Philada. In bottom margin: Published by C.S. Williams, N.E. corner of Market & 7th Street, Philadelphia 1846.38 x 31 centimetersJPEGUMN_ALMA:9947198440001701engCarey & Hart; C.S. Williams (Philadelphia)PublicIowaMapsIowa1846University of Minnesota