All deeds heretofore duly made, and on motion in open court entered among the records thereof, in conformity with the act of January 16, 1799,¹ entitled “An act to facilitate the barring of entails,” although not recorded within six months next after the execution thereof in the office for recording deeds, shall be equally available and valid within the intent of said act: Provided, That the same shall have heretofore been recorded in such office.