If anyone within the description of indigent persons specified in this title, shall be found in any county, and the overseers of the indigent of such county shall be unable to ascertain and establish the last place of legal residence of such person, they shall proceed in their discretion to provide for such indigent person, in the same manner as other persons are hereby directed to be provided for by law and under such restrictions as the county commissioners shall consider most advantageous for the interests of their respective counties and the welfare of the people therein.