It shall be lawful for all Bodies Politic, Corporate, or Collegiate, and for all Trustees, for the Time being possessed of or entitled to any Leases, Terms of Years, or Chattel Interests, or to any Manors, Lordships, Messuages, Lands, Tenements, Hereditaments, Rents, Pensions, Annuities, Rights of Common or Mining, or other Charges or Rights which the Council of His said Royal Highness shall be desirous of purchasing, under the Powers herein-before given, and for all Tenants for any Interest short of an absolute Interest therein, and for the Guardian or Committee of any Person interested therein who shall be an Infant, F1person of unsound mind , Idiot, or otherwise incapacitated to act for himself, to contract and agree with the said Council for the absolute Sale to His said Royal Highness of such Leases, Terms, Chattel Interests, Manors, Lordships, Messuages, Lands, Tenements, Hereditaments, Rents, Annuities, Pensions, Rights of Common or Mining, Charges or Rights, and to assign, release, convey, or surrender the same accordingly; and every such Contract, Agreement, Assignment, Release, Conveyance, and Surrender shall be as good, valid, and effectual in the Law, to all Intents and Purposes whatsoever, as if the same were made by a Person absolutely entitled to the Property sold, and under no Disability or Incapacity.