Comprises a notebook labelled 'Clock Book: Astrolabe Smoothed 4475 Slow on ZVO and Estimated Corrections to 447(S)'. The volume contains tabulated data. A flowchart at the front of the volume outlines the procedures by which results are processed and there is a detailed description of data entered in the volume written by David Thomas.

Comprises a notebook labelled 'Time Results'. A note on the front cover of the volume reads 'Final values of Run2 * - SiD and UT2 (0) - UT2 (def), also PY, scale value, Prism Angle P/E, Astro T'. The volume contains tabulated data for March 1965 to April 1969.

Comprises a notebook labelled 'Latitude Results'. A note on the front cover reads 'also wind direction, wind velocity'. The volume contains tabulated data from March 1965 to April 1969.

Comprises circuit and wiring diagrams of the astrolabe drawn by A. M. Allen of the RGO Electronics Department. Includes diagrams of revised instrument wiring; revised connections between instrument and other units; control unit; 50 volt supply unit and flash alarm; and temperature unit.

Comprises a report produced by A. M. Allen of the Royal Greenwich Observatory Electronic Department, titled 'The Modifications to the Danjon Interpersonal Astrolabe to allow Photographic Recording of the Lead Screw Position - as sent to the Cape Observatory.'

Comprises a notebook labelled 'Astrolabe Miscellaneous Notes'. Contains notes on: stars (groups catalogues, double groups, twice observed); recipe for photographic developer and hypo; provisional programme; graphs (barometer, speed error, drive, azimuth, temperature etc.); reglage; duty run flowsheet; copies of letters; order for photographic film. With loose inserts including typed notes on programme NA287/A and notes on motor speed tests.

Comprises a report written by D. V. Thomas.

Comprises plans and notes concerning the construction and siting of the proposed Astrolabe hut at the Royal Observatory, Cape of Good Hope. Includes elevations for proposed astrolabe hut; layout diagrams; and other notes, diagrams and calculations relating to the astrolabe hut.

Comprises a print-out of output from computer program 179/C: Almucanter transit at Cape. The figures record: star number; magnitude; azimuth; LST (hms).

Comprises papers relating to computer program C87/7. Includes notes on punching of 'Spectral Type' on to green C87/7 cards; punch card layouts; and tabulated data. The data records: FK3 number; magnitude; spectral type; right ascension; declination.

Comprises notes, data, hand calculations, test packs, and data cards for used for the checking of computer programme 177.

Comprises notes and calculations on alterations to program, notes on additional computer runs needed, wiring diagrams, and other notes.

Papers from a file labelled '177 Astrolabe Miscellaneous Papers'. Comprises rough notes, calculations, formulae, charts, and diagrams. In addition to this file, there are notes on computer run 177/Z, tabulated data of corrections to program 177/P; description of duty run for program NA 287/A; and a flow chart.

Comprises loose papers; a bundle of papers labelled 'Machine Section 179 Astrolable Working Catalogue'; and a bundle of papers labelled '179A/B, 179C/D, Astrolable - working catalogue Herstmonceux and Cape'. Papers include rough notes; correspondence between D. V. Thomas and A. E. Carter at H. M. Nautical Almanac Office about the program; lists of title cards, corrections, and data; test packs for the program; and other papers.

Comprises a table of data titled 'Scott Stars in the Astrolabe Standard Lists'. The data records: Scott number; [FK4 number]; right ascension and declination.