Pennsylvania Statutes Title 64 P.S. Public Lands § 3. Former grants to be valid

All and every the rights, titles, estates, claims and demands which were granted by or derived from the said proprietaries, their officers, or others by them duly commissioned, authorized and appointed, or otherwise, or to which any person or persons, other than the said proprietaries, were or are entitled, either in law or equity, by virtue of any deed, patent, warrant or survey, of, in or to any part or portion of the lands comprised and contained within the limits of this state, or by virtue of any location filed in the land office, at any time or times before the said 4th day of July, in the year of our Lord 1776, shall be and they are hereby confirmed, ratified and established forever, according to such estate or estates, rights or interests, and under such limitations and uses, as in and by the several and respective grants and conveyances thereof are directed and appointed.