Before I knew when the deed was recorded in Bedford County in 1783, I searched Cumberland, and Westmoreland county warrant registers for early William Smith surveys.
In Westmoreland County there was an October 31, 1774 survey (Book A-27, Page 43) for property that was "...Situate on the Waters of Conemaugh adjoining land of Garret Pendergrass including his Improvement..." Although it is interesting that William Smith obtained property of the Indian Trader Pendergrass, the property was not in the Turkeyfoot region.
In Westmoreland County, there also was a June 21, 1774 survey (Book Y Page 99) for property on a "Northerly Branch of a Large Run that empties into Plumb Creek..." The referenced Plumb Creek is probably the one in what was then Armstrong Township.
I reviewed all the other William Smith surveys in old Westmoreland County that I could find. I eliminated them as candidates to be the property John Owens deeded to William Smith because the properties were far from the town of Confluence.