Correspondence regarding meteorology and the sighting of meteor showers, divided into eight sections:

Correspondence between D. Gill and the Meteorological Office, London, regarding the supply of equipment, barometers, etc., to the Cape Observatory, 18 March 1879 - 5 April 1884.

Correspondence between D. Gill, the Meteorological Commission and various individuals on the preparation of annual weather reports and measurements made, 30 May 1879 - April 1895.

Correspondence between D. Gill and the United States Signal Office, 16 May 1879 - 1 August 1887, comprised mainly of acknowledgements from the Office of the receipt of International Meteorological Observations sent to it by the Cape Observatory.

Letters to D. Gill requesting information on meteorological matters of a largely local nature, 25 February 1880 - 20 September 1895.

A letter to D. Gill from G. Whipple of the Kew Observatory regarding the sending of a standard thermometer to the Cape, 15 September 1879.

Letters to D. Gill from officers of Her Majesty's ships sending readings from various instruments, 1880.

Correspondence concerning the sighting of meteor showers, 28 November 1883 - 19 June 1893.

Miscellaneous letters to D. Gill from individuals and other observatories, 1 October 1879 - 31 December 1895, requesting meteorological information, and including a list of barometric readings made on Table Mountain during October 1893.