I found this in the History of CLarion County by A J Davis in the Porter Township section while researching the Shreckengost rifle I have that is signed John McCann. There was a prominent John McCann living in the same town as Shenefelt in 1824 and his daughter was married in that town in 1848 which is close to when the gun was made. This area is about 10 miles from the Shreckengost rifle shop.
"Nicholas Shanafelt, a gunsmith, moved his family from Huntington county to Leatherwood, near Brinkerton, in 1835. Some of his sons became prominent Baptist ministers. His son William, living at present near where they first settled, cleared the place, improved the land, and has taken a live interest in importing and raising short horned cattle. Some of them are bred directly from cattle brought from England. His herd at present is one of the finest in the county. He has also been an active worker in the Leatherwood Baptist Church ever since it was organized."