Timeline of Ann Arbor and Washtenaw County Area History including its many Tragedies, Crises, Disasters, and Shocking News:

George Sedgwick became Ann Arbor's first Mayor in 1851-1853; he was formerly a Probate Judge, and served as Village President, 1845-1849, and relocated to Chicago in 1853 with his partner, James Monroe Walker, and were solicitors for the Chicago, Burlington & Quincy Railroad Company through 1875. Walker was an 1849 University of Michigan graduate who became President of that railroad company, 1870-1875.

First Ward School was established on State St. in 1851; it was later renamed West Hall (West Hall History) (Ann Arbor School History)

Congress Street Fire in Ypsilanti in 1851