Trinity Hall to be permitted for 18 years to extract gravel from half an acre of arable land in the tenure of Whittred lying between the road running by Clare Hall Piece (E) and a balk (W) and abutting (S) towards King's College High Walk and (N) towards Garrett Hostel Lane. Trinity Hall also to construct a brick tunnel from the end of the land and under the road, for drainage, with a ditch to carry water to the tunnel, and to leave the land levelled at the end of the contract.