“ Ouen, whose heirs the said Philippe de Carteret is, any lands, tenements or heriditaments, parcels of the said Isle of Sark, for such states, during such terms, as the tenants, farmers and occupiers of the said Isle of Sark, heretofore have been used, or at this present may bargain, sell, convey, let, lease, demise or assigne the same lands, tenements or heriditaments to any person or persons there, under the seal or seals of the said Isle of Guernsey and Jersey or either of them ”