Hi Roger--One of the most interesting firearms collections I ever saw was in Hartford, CT. Harford is/was the home of Colt Firearms, and in the Capitol Building there they have a nice exhibit. Included was a rifle that had a revolving cylinder and a Buntline Special. I don't know if Wyatt Earp ever got one, but the gun does exist. When I finally get my Boston blog up I will post pictures.