64 Pa. Stat. § 154
All actual settlers who had, adverse to the warrantees, commenced an actual settlement and residence on any tract of land heretofore surveyed on original warrants, and who have resided thereon two years, and in that time cleared, fenced and cultivated three acres of said tract of land, and have abandoned their settlements on said tracts at any time before the whole of the settlement, residence and improvements required by said ninth section of said act of 1792 were fully and completely made and ended, and who shall either himself or his legal representative return to said tract before the said first day of June, 1813, and settle and reside on the same so long as, with the residence and improvements aforesaid made thereon, shall amount to what is required by said ninth section of said act, such settler or his representative, so returning and residing as aforesaid, shall be entitled to all the benefits of an actual settler under this act, and the act of April 3, 1972, but should he or his legal representative neglect to return or fail to recommence said settlement within said time, and perform the conditions herein before mentioned and required, his previous settlement shall be considered abandoned after said first day of June, 1813, and it shall be lawful in such cases, after the said day, for the original warrantee or his representative, to dispose of the same, in the same manner and under the same conditions as lands where no actual settlement was commenced; and on the same conditions and under the same exceptions as in other cases, will the commonwealth cease to have any further claim to such tracts of land.
64 P.S. § 154