 In the mid-18th century this rich transmontane area drew the first Indian traders, exploring surveyors, military men and later settlers, many of whom were at least nominal Anglicans primarily from Maryland, eastern Pennsylvania, and Virginia.The earliest penetration of the southwest corner of the state, then sparsely populated with Indians, was made by Episcopalians who set up posts in the 1740s along the Allegheny, Youghiogheny and Ohio Rivers.Maryland surveyor Christopher Gist crossed the mountains to survey large claims of the best farm land.