Correspondence of G.A. Harding regarding administrative and astronomical matters, including letters concerning the occultations of Antares, 9 January 1969; a request for information on globular cluster NGC 6171, 29 January 1969; details of the Cape Transit Circle, 17 February 1969; maintenance work to be carried out on the 30-inch telescope, 17 April 1969; the specification for the prime focus plateholder mount on the Isaac Newton Telescope, 14 March 1969; defects in the R 40 plates, 5 September 1969; work on photometry, 16 September 1969 and 14 January 1970; the purchase of a laser, 18 March 1970; the Transit of Mercury, 9 May 1970; the testing of a zero corrector lens, 27 July 1970; problems with photometric plates taken on the 40-inch telescope, 7 September 1970; D-Max instructions for measuring photographic plates, 25 March 1971; adjustments to 40-inch optics, 18 June 1971; information on the six-inch collimator lenses of the Christie altazimuth; preparation of the Radical Velocity Annual, 5 April 1972; and administrative matters. The correspondents include the Revd R. Woolley, A. Hunter, Dr S.V.M. Clube, R.H. Tucker, C.A. Murray, R.H. Stoy, J.F. Hosie and Professor E.M. Burbidge.