The letter was a reply of Thomas Royds to memorandum No. 1541 D/20-1 dated 11th June 1920 from the Revenue Department, Government of Madras. Thomas Royds discusses in this letter the challenges involved in creating a Kodaikanal and Madras Observatories report in the prescribed format for any period other than the calendar year.

This letter is from Thomas Royds to the Director General of Observatories stating new works regarding new buildings for Poona instruments. In this letter, the Superintending Engineer asked for 10,000 from the Madras Government for buildings.

Letter from Thomas Royds to Director General of Observatories requesting government order referred to the letter received from Executive Engineer, Madura Special Division.

The letter served as a response to The Director General of Observatories's inquiry, stating that he had not received any orders from outside.

The letter informs the correction of the data for the annual report 1913, which G. C. Simpson, the Imperial Meteorologist in SIMLA, prepared. The mistakes in the lowest barometer reading from August to December are mentioned in a tabular form.

The letter was about the zodiacal light observation in 1916 done by A. A. Narayana Ayyar from Solar Physics Observatory, Kodaikanal. Thomas Royds sent the letter to Maunder in 1916. A. A Narayana Ayyar was the third assistant of Kodaikanal Observatory during that time.

The letter was sent from Thomas Royds to Gilbert T. Walker, the Director-General of Observatories, giving information about mean wind directions taken from Kodaikanal Observatory. The letter was sent from Kodaikanal to Simla in 1914.

The letter was sent to A. Bamford, who was the Superintendent Observatory, Colombo, as a reply to letter No. F M/567. The letter discussed the Great Trigonometrical Survey of India, Specifically the determination of the longitudes of the Madras.

This is the copy submitted to the Chief Engineer, Public Works Department, for information with reference to his memorandum about the estimate for the writer's quarters and the funds required for the year 1904-05 amounting to 10,950.Along with a copy of a letter from Charles. P. Butler, Ag: Director, Kodaikanal & Madras Observatories to Executive Engineer Madura regarding some construction needs at the Solar Physics Observatory, like a permanent building to hold the 4-inch photoheliograph, a glazed verandah for keeping the north-western side of the observatory dry, an open verandah for the Bookbinder's shed and quarters for the writer of the observatory.

This is a letter from the superintendent, observatory for surveyor general to the director of Madras Observatory to enquire about the value of 5hr.20mts.59.6secs.