This letter was a copy of an office order was sent by The Director of Ordnance Factories, Calcutta to The Director, Kodaikanal & Madras Observatories, in 1919. The document contains details regarding reuniting with Thomas Royds, Kodaikanal Observatory's Assistant Director, by August 4th, 1919.

The office order was about the temporary promotion of Thomas Royds and A. A. Narayana Ayyar. Due to the absence of John Evershed, Director of Solar Physics Observatory, Kodaikanal, The Assistant Director, Thomas Royds, was appointed as Acting Director, and The first Assistant, A. A. Narayana Ayyar, as The Acting Assistant Director. The order was sent from Simla in 1920.

The document contains the appointment details of Thomas Royds as the Acting Director of the Kodaikanal and Madras Observatories during the absence of John Evershed on his deputation to New Zealand.

The item deals with the appointment of Thomas Royds as the Director of the Kodaikanal and Madras Observatories, with effect from 26th February 1923 after the retirement of John Evershed. It is mentioned that a copy of the letter was forwarded to the Director-General of Observatories, wide no.524-16, and another copy was forwarded to the Director, Kodaikanal and Madras Observatories, Kodaikanal, for information.

The fond contains documents of Thomas Royds, the past director of Kodaikanal Solar Observatory. It consists of mainly official letters, administrative documents, pay slips and handwritten documents related to Thomas Royds.

The cassette is about a one-day seminar on the world year of physics that is held at IIA Auditorium.

The handwritten document was an explanatory memo by John Evershed, signed in 1918. A. A. Narayana Ayyar was the 3rd Assistant of the Solar Physics Observatory, Kodaikanal, from 1913 to 1918. During that period, he also served as the 2nd Assistant of the Observatory for more than one year. The memo was about the approval of the allowance provided to A. A. Narayana Ayyar for the service as 2nd Assistant. The exact dates during which he acted as the 2nd Assistant of the Observatory are also mentioned in the document.

The order was related to granting leaves to R. Ll. Jones for 11 months and ten days. R. Ll. Jones was working as the Meteorologist at Madras and Deputy Director of the Madras Observatory.

The order is from the Government of Madras to the chairman, the Municipal Council, Kodaikanal, approving the proposal to extend its limits to the observatory buildings and as for the objection from the Director regarding the water supply, the area will be exempted from paying the water tax proviso(b) to section 84 of the Madras District Municipalities Act, 1920.

This item was a order of the extension of leave granted by His Majesty's Secretary of State for India extension of leave or permission to return to duty as advised in list dated the 13th October 1920