I found William and Lillian in several City Directories of Springfield, MO, beginning in 1915. In the 1920 directory he was working at H.D. Chinn Cigars in Springfield. The same directory shows a Hiram D. Chinn (wife Dot M.) as the owner of the company. Perhaps they are related. In the late 1920's, William is listed as a Justice of the Peace. The directory shows William married to a May L. (is this Lillian M.?) so I'm not sure if this is still YOUR William. If so, he appears to have died in 1927 or 1928 since May L. is listed as a widow in the 1928 Springfield Directory. Hope this helps in your search.