Bird’s eye map of St. Louis with the location of Adam Hammer's Humboldt Institut marked

1876 bird’s eye map of St. Louis with the location of Adam Hammer's Humboldt Institut marked with a red box. The institute was across from the St. Louis City Hospital near Lafayette Square. From Pictorial St. Louis, the great metropolis of the Mississippi valley; a topographical survey drawn in perspective A.D. 1875, by Camille N. Dry; designed & edited by Rich. J. Compton (St. Louis: Compton & Co., 1876).