1. City of Ann Arbor, Washtenaw Coty. Michigan; surveyed & published by S. Pettibone.; City of Ann Arbor, Washtenaw County Michigan Maps University Of Michigan Public content 1869. Pettibone, S. and Worley & Bracher. Relief shown by hachures and spot heights. Cadastral map. Includes ill. of the Detroit Obervatory on lower portion of map. "Engd. by Worley & Brach...