I've got that one in my article dealing w/ interesting things found in the PA Gazette, although unfortunately I've not had time to get it uploaded to my newer site since the changeover.
Have to wonder how the heck he "lost" it. Maybe he was swigging on a bottle while traveling, sat down under a tree Rip VanWinkle style and forgot the rifle? Or maybe it literally fell off the wagon?
For two dollars, given the description of the rifle, I doubt he recovered it.