This is a reply letter to T. Royds stating the length and width of the morse tape required for chronograph

This is a circular letter from A.G. Cardew, AG Secretary to Government, regarding adopting standard time for railways and telegraph offices. The standard time in India will be 5.30 hours ahead of Greenwich Mean Time and 9 minutes ahead of Madras time. In Burma, it will be 6.30 hours ahead of Greenwich Mean Time and 5 minutes and 23 seconds earlier than Rangoon time. The change will be introduced at midnight between June 30 and July 1, 1905.

This fond contains correspondences related to clocks in Madras and Kodaikanal Observatory

The fond contains correspondence related to Signaling Time from 1904 to 1923. It has letters from Thomas Royds, Gilbert T. Walker and the Director General of Telegraphs.

This letter was about receiving the time signal from some intermediate station considered useless.

This is a letter from the Director of Kodaikanal and Madras Observatories to the Meteorological Reporter to the Government of India and the Director General of Indian Observatories regarding the new standard signalling time arrangement. The Government of Madras has also accepted the standard time for local signals.

This is a letter from F.W. Pirrie Lieut-colonel to The superintendent of Telegraph Madras regarding the longitude of the point which is used to estimate madras time.

This letter is from Gilbert T. Walker to John Evershed regarding the loan and overhauling of a Chronometer if it is impossible.

This is a letter from Gilbert T. Walker, Meteorological Reporter to the Government of India and Director General of Indian Observatories, to the Director of the Solar Physics Observatory, Kodaikanal, regarding adopting standard time. An official order has yet to be received, so kindly arrange with the Superintendent of the Madras Telegraph Office to send the time signal at 16:00 hours, new standard time, after July 1.

This letter is from Gilbert T. Walker, Meteorological Reporter to the Government of India and Director General of Indian Observatories, to the Director, inquiring whether any notice has been received from Washington regarding a unique series of midnight telegraphic signals to be sent out by the U.S. Naval Observatory on May 3 1905.