For carrying into full effect the provisions of the act to which this is supplementary, it shall be the duty of the surveyor general to make out and forward to the several county surveyors respectively, from time to time, as the board of property may determine, special lists of warrantee names of unpatented tracts, or remaining parts of unpatented tracts, of lands within the several counties, as the same may appear upon the land lien dockets, with such other data relating thereto as he may deem necessary.
64 P.S. § 469