Interesting discovery! Are you sure yet that this is the same William B. Bush who was found in Long Prairie, Mississippi County, Missouri? "Our" William B. Bush MAY have had the middle name Bennett. But I would want proof that these two Williams are the same man first. A Bennett family was related to his mother's Rowland family. Rev. Micajah Bennett was a long time close friend and pastor in the Baptist Church dating back to 1773 in Albemarle County, VA with Rev. Reuben Rowland. Reuben was our William Bush's maternal grandfather. The two men were also brothers in law and married to daughters of John Blalock. But before jumping to any conclusions and declaring this William Bennett Bush as "ours" , I'd like to see some more confirmation!
If this turns out to be valid - it is a very interesting and important find! Thanks.