My grandfather was born in or near Chicago, Illinois in 1914. I know from a short autobiography he wrote that he was born between what is now O'hare airport and Lake Michigan, near the intersection of Lamon Ave. and Montrose. In 1914, would this have been Cook County? Lake County? Does anyone have a link to a map from that time? I want to order a copy of his birth certificate, but the state doesn't have records older than 1916, so I need to write to the correct county.