 Richard I granted a charter on 4 December 1189, in which he extended the list of liberties and confirmed their possessions in detail, these including the churches of Gamlingay in Cambridgeshire, Layer de la Haye and Marks Tey.These and other charters were confirmed by Henry IV in 1400, and again by Henry VI in 1427.The temporalities of the priory were valued in the Taxation of 1291 at £42 16s.