All and every person or persons, and their legal representatives, who has or have heretofore settled on the north side of the west branch of the river Susquehanna, upon the Indian Territory, between Lycomick or Lycoming creek on the east, and Tyagaghton or Pine creek on the west, as well as other lands within the said residuary purchase from the Indians, of the territory within this state, excepting always the lands hereinbefore excepted, shall be allowed a right of pre-emption to their respective possessions, at the price aforesaid.