Comprises deeds relating to members of the Irby family of Lligwy and their estates in England and Wales. Includes documents concerning property in the parishes of West Dean, Treyford and Shipley in Sussex; Hillingdon in Middlesex; Moulton in Lincolnshire; Whiston and Denton in Northamptonshire; Langley, Ivor, Hedsor (Headsore) and Woodburne in Buckinghamshire and Llanfair-yng-Nghornwy, Anglesey.
Also included is a letters patent of Queen Anne creating Edward Irby a baronet, 1704, and a probate of the will of Christian Elizabeth Irby, 1875.