 [ I ] f any person or persons whosoever shall attempt to purchase or contract for , or cause to be purchased or contracted for , or shall take or <unk> of a grant or conveyance of any lands or tracts of lands from any Indian , or body of Indians , upon any <unk> whatsoever , ( except for the use of the crown and that by permission for this purpose first had and obtained from his majesty , his heirs or successors , or his or their governor or commander in chief of the said province for the time being ) every such purchase , grant , contract and conveyance , shall be , and is and are hereby declared to be null and void , to all <unk> an purposes whatsoever . . . . 
