U DHP/1 Minutes and Attendance Registers, 1913 - 1975

U DHP/2 Accounts, 1941 - 1975

U DHP/3 Contracts with Her Majesty's Stationery Office, 1958 - 1966

U DHP/4 Files, 1943 - 1975

U DHP/5 Membership and Shares, 1948 - 1975

U DHP/6 Miscellaneous, 1897 - 1978