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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.

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 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 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.

This letter is from T. D. Berrington to the Director regarding the change in the duration of the time signal from 3 to 2 minutes.

This letter is from T. D. Berrington, Director General of Telegraphs, to the Director of Kodaikanal and Madras Observatories, Kodaikanal, regarding the inconvenience for the Alipore Observatory operating without regular time signals at 16 hours on Sunday and not object to discontinuing the service elsewhere.

This letter is from the Deputy Director of Madras Observatory to the Director regarding the distribution of the time signals observed by Mr Newlands.

This letter is from the Deputy Director of Madras Observatory to the Superintendent of Telegraphs, who said that he cannot alter time signals without the sanction of the Director.

This letter is from the Deputy Director of the Madras Observatory to the Director General of Telegraphs regarding the daily signalling of the time needs correction and to indicate for all telegraphists to signal at the time as sixteen and for all the officers to note the exact time and adjust their clocks accordingly.