Julian Sidney Rumsey ( April 3 , 1823 in Batavia , New York - April 20 , 1886 in Chicago , Illinois ) served as mayor of Chicago , Illinois ( 1861 -- 1862 ) for the Republican Party .
Julian Sidney Rumsey ( April 3 , 1823 -- April 20 , 1886 ) served as mayor of Chicago , Illinois ( 1861 -- 1862 ) for the Republican Party . Rumsey was born on April 3 , 1823 in Batavia , New York .