The letter is from the superintendent of the trigonometrical survey to the Director of Kodaikanal and Madras Observatories, forwarding proofs of the results of the reduction of the sun charts.

This is a copy of a letter from the superintending engineer VI circle requesting for the return revised of plans and estimates for the construction of engine house connected with the scheme of electrical installations at the Kodaikanal Observatory.

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.

The letter is from Thomas Royds to G. C. Simpson regarding a book on arctic meteorology. It requests for receipt of the same.

The letter is from T.Royds to G. C. Simpson, Director General of Observatories, Simla, regarding a statement in nature on the August 26, 1915 issue. It states that the nature of copy has been sent to John Evershed but the paper by Glauert is being sent with the letter.

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 is from Thomas Royds to Le Directeur Observatoire Royal, Berlin, regarding missing volumes of publication. It consists of the list of publications that are not available in the Kodaikanal Observatory

The letter is from Thomas Royds to Messrs Grindlay & Co regarding a bill of exchange. It states that a bill of exchange for the estimated cost of periodicals 1921 is enclosed with the letter. It also requests for a stamped copy of the receipt of the amount and statement of accounts in duplicate by return mail.

The letter is from Thomas Royds to Messrs Grindley & Co with an order for periodicals. It consist of an order for a list of periodicals and also states that the amount for the subscription of periodicals will be remitted through a bill of exchange.

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.