21 Pa. Stat. § 278
Where any deed or conveyance of land within this State has been executed, acknowledged, and delivered by any executor of or trustee appointed by the last will of the deceased owner of such lands, and where said will contained a power or authority to the executor, trustee or trustees, or executors, to sell lands of the testator, and where such will has been duly probated, and such deed or conveyance has been placed of record prior to the first day of January, nineteen hundred and ten, in the county where the lands were situate, and where the purchase money for said lands has been paid to any such executor or trustee, and any possession of the lands conveyed was thereupon taken or claimed pursuant to such conveyance, and has continued to the date of the passage of this act, without any action having been heretofore brought and adjudicated in court determining the invalidity of such conveyance, acknowledgment, or record, or the possession or right of possession of the grantee therein, his heirs or assigns, such deed or conveyance, and such acknowledgment and record, shall be deemed and adjudged to be good, valid, and effectual in law for transferring and conveying the estate, right, title, and interest of such testator and of the grantor or grantors of, in, and to the lands, tenements, and hereditaments herein mentioned.
21 P.S. § 278