Yes, there is a family web site at. Try accessing it again.
David had a Warrant for land in Somerset County, PA, dated in 1773 and lived there until he sold his land to Catherine's brother Jacob in 1794. So there are surveys and deeds at the Somerset Court House. The Tax Assessment records are now archived off-site with Iron Mountain, but arrangements can be made for them to be brought to the Court House. Inquire at the Assessor's Office about making the arrangements and about the current fee.