A letter from K. Tweedie, Science Research Council, to Dr Hunter, 2 April 1973, requesting copies of the Large Telescope Users' Panel report presented in May 1972, as well as grant/telescope time applications. He encloses tables of allocations of time on the Isaac Newton Telescope and 74-inch telescope during 1971-1972; the report of the eleventh meeting of the L.T.U.P on 17 March 1972, with an appendix; and the appendix to the Panel's report on the tenth meeting, 16 November 1971.

Correspondence and other papers regarding the Schmidt Telescope.

Correspondence and other papers regarding the Yapp 36-inch Telescope.

Two drawings by A. Morris of the proposed mounting for the image intensifier for the Yapp Spectrograph.

Papers regarding the refurbishment of the Yapp 36-inch Reflecting Telescope, including drawings of mirrors for the collimator, with a note by P.E.J. Pagel and Sir Richard Woolley.

The PZT papers include: five boxes of Dudley S. Perfect and PZT papers; two observer's notebooks (1982-1983); three fault repair notebooks (c.1973-1983); a PZT 'phase slips and clock repair book' (1975); and PZT plate records.

A set of 39 technical drawings, originally rolled together and labelled 'RD Instrus. [Instruments] Dev. and Gen. User, Drg Nos AZ/002, X/BA/001, X/BB/001 and V/FD/000'. Includes V, X, Y and Z sized sheets, V being the largest. Many (if not all) relate to instruments designed for the Isaac Newton Telescope at La Palma, including drawings of the Image Photon Counting System (I.P.C.S) which was first used in March 1984.

Report of the fourteenth meeting of the Large Telescope Users' Panel on 9 April 1973, regarding instrumentation, applications for I.N.T. (Isaac Newton Telescope) time, applications for 74-inch time and applications for time on South African Astronomical Observatory telescopes, with tables on nights allocated on the I.N.T. and 74-inch telescope.

A copy of the Annual Review of the U.K. Schmidt Telescope Unit prepared by Dr R.D. Cannon, presented for comment to the Panel for the Allocation of Telescope Time of the Astronomy, Space and Radio Board, Science Research Council.

Papers, records and photographs for the RGO La Palma Operations Division and the Roque de Los Muchachos Observatory. Includes paper files recording day to day administration, a large series of photographic records in albums, various sets of publications relating to telescopes and instruments and a small set of press cuttings.

A set of 160 technical drawings relating to the Isaac Newton Telescope at RGO Herstmonceux. Many are untitled. Originally rolled together in four rolls marked 'RY Old INT Miscellaneous, 1st system Nos. not m/f'. Includes a set of miscellaneous sized drawings, followed by three sets of drawings of sheet sizes X, Y and Z, Z being the smallest.

Red bound volume of 19 printed scientific papers by Howard Grubb, each presented or published between 1878-1905. The volume begins with a handwritten index.

Red bound volume of 33 printed scientific papers primarily by Howard Grubb and Thomas Grubb, but also by Warren de la Rue and others, each presented or published between 1857-1905. The volume begins with a handwritten index.

A set of technical drawings of the Anglo-Australian Telescope, originally in seven rolls labelled 'XA AAT'. Includes V, W, X, Y and Z sized sheets and two additional sets: one labelled 'mixed size sheets + MZ' comprised of electricity supply drawings by contractors and another originally wrapped in paper titled 'A.A.T. Exposure Meter'. Also included is a set of prints of drawings of the AAT Coudé Spectrograph, originally folded in a package titled 'XA A.A.T. Spec. (Prints)'.

A set of 101 technical drawings of instruments for the South African Astronomical Observatory, Radcliffe Pretoria. Originally in two rolls labelled 'XC SAAO Radcliffe Pretoria'. Includes drawings of sizes V, W, X, Y and Z.