And be it further enacted, That it shall and may be lawfull to and for any Person, or Persons, Bodies Politick or Corporate, to purchase any of the Estates or Interests herein before vested in the said Trustees, and the same soe purchased, to retaine and keepe to them and their Heires, Successors, Executors, Administrators and Assignes respectively; Any Statute of Mortmaine to the contrary thereof in any wise notwithstanding