Whenever satisfactory evidence shall be given to the surveyor general¹ that a lien or liens have been entered against lands for which the commonwealth has been fully paid, both for land and patent fees, he is hereby authorized, and it shall be his duty, to give to the party or parties applying for the same a release of said lien or liens, so far as said patented lands are concerned; which said release may be entered on the land lien docket, in accordance with the provisions of the supplement² to the act³ of which this is a further supplement, approved April 4, 1868.