An Act to enable his Majesty to grant to Her Majesty the Queen a capital Messuage, called Frogmore, and divers Lands and Hereditaments in the Parishes of New Windsor and Old Windsor, in the County of Berks, and a Piece of Land in Wyrothsbury, in the County of Bucks, for a Term of Ninety nine Years, if Her Majesty and the Princesses, Her Five younger Daughters, or any of them, shall so long live, for and in lieu of Her Majesty's present Terms and Interest therein; and also to make Exchanges.