64 Pa. Stat. § 197
No conveyance or assignment of lands granted to soldiers and widows of soldiers of the revolutionary war, made by such soldiers or widows, prior to the date of the respective patents, or any transfer or sale of the right of said soldiers or widows, by them executed prior to the date of said patents, shall invalidate the title of the said patentees, their heirs and assigns, unless there shall be contained in said patent a recital of such deed, conveyance, transfer or assignment, or unless the same shall have been duly recorded in the proper office of the county in which the lands are situated: Provided, That nothing in this act contained, shall be construed to confirm or render valid any conveyance or transfer by such soldier or widow, which was prohibited by law.
64 P.S. § 197