(1) Official correspondence and minutes of the Board of Management regarding the design and finance of the Isaac Newton Telescope:

Summary of official correspondence since the last Executive Committee meeting on 16 November 1956, dated 1959.

Correspondence concerning microseisms affecting the Isaac Newton Telescope, 1957-1959.

Letters and a diagram from Dr David Dewhirst concerning the Lick prime focus cage, 1959.

News release from the Admiralty on the subject of the Isaac Newton Telescope, issued 23 February 1959.

Correspondence with the Admiralty, 1959, confirming that Treasury approval has been given for work on the Isaac Newton Telescope to proceed in the financial year 1959-1960.

Letters from H.H. Plaskett and R.O. Redman concerning the possibility of a 74-inch mirror rather than a 98-inch mirror for the Isaac Newton Telescope, 1958.

Memorandum by the Astronomer Royal on the subject of the Isaac Newton Telescope, 1958.

Address to the Royal Astronomical Society by Richard Woolley concerning the Isaac Newton Telescope, 9 July 1958.

(2) Correspondence and minutes of the Board of Management regarding the design and finance of the Isaac Newton Telescope:

Letter from R.O. Redman to Richard Woolley regarding the unsatisfactory management and progress of the Isaac Newton Telescope, 1958.

Note of a meeting held on 22 January 1957 to discuss the future of the Isaac Newton Telescope.

Letters from R.O. Redman regarding the Isaac Newton Telescope dome construction, 1956.

Letters from Richard Woolley to the Admiralty regarding the 74-inch Helwan Telescope, 1956.

(3) Correspondence with Sir Howard Grubb, Parsons and Co. Ltd regarding all aspects of the Isaac Newton Telescope and building:

Proposed yearly plan of work on the Isaac Newton Telescope from George Sisson, 1959.

Letters from G. Sisson regarding the monetary saving of having a 74-inch telescope rather than a 98-inch telescope, 1959.

Correspondence with the Corning Glass Works of Zurich concerning glass mirror blanks, 1959.

Letter from Sir Howard Grubb, Parsons and Co. Ltd, 20 February 1958, regarding the receipt of official notification from the Admiralty that all work on the development contract covering the design study for the Isaac Newton Telescope is to cease forthwith.

Specification for the Isaac Newton Telescope issued by Sir Howard Grubb, Parsons and Co. Ltd, 31 January 1957.

Specification for the Isaac Newton Telescope issued by Sir Howard Grubb, Parsons and Co. Ltd, 20 September 1956.

Specification for optical parts for the Isaac Newton Telescope issued by Sir Howard Grubb, Parsons and Co. Ltd, 25 September 1956.

Specification for a building for the Isaac Newton Telescope, 26 September 1956.

Outline specification for an observatory dome 61-feet outside diameter issued by Sir Howard Grubb, Parsons and Co. Ltd, 27 September 1956.

Outline specification from Sir Howard Grubb, Parsons and Co. Ltd, 28 May 1956.

Drawing No. 6726 from Sir Howard Grubb, Parsons and Co. Ltd showing the 'Diagrammatic Arrangement of Mirror Support' for the Isaac Newton Telescope, 1956.