The letter points out that the new wire which was inserted in the Photoheliograph on Nov.14, 1922, does not appear to be taut in its frame. The resulting irregularities make the measure of the Zero point a little uncertain.

This letter was about the request by Judge on the information of magnetic variation in the years 1877-1878 and also what it is now in Madura district.

This document originates from G.J.J. Harris, a consulting architect the Government of Madras engaged. It is addressed to the Madras and Kodaikanal Observatory director about the approval and submission of plans and estimates related to the construction of Kodaikanal Observatory buildings. Various aspects necessitated official sanction, encompassing the workshop for the mechanic, estimates for water supply in the director's residence, construction of a verandah for writers' quarters, provision of bookcases and furniture, landscaping of the grounds, provision of mats for the assistant's house, erection of additional outhouses for the first and second assistant quarters, and the construction of the observer's house at Periacolum, along with associated compensation. The communication underscores the comprehensive nature of the proposal, seeking the necessary approvals for diverse elements crucial to the successful realization of the Kodaikanal Observatory infrastructure.

This letter was a request regarding the present state of knowledge about the periodocity of sun spot activity.

This is a letter from Gilbert T. Walker to the Director of Kodaikanal and Madras observatories informing that the Richard's daily Thermograph by L.Casella has been forwarded by rail

This is a reply letter from Gilbert T. Walker to the Director of Kodaikanal and Madras observatories informing that the drums of the thermograms are not always interchangeable. It further states that he is giving calcutta office instructions regarding sending of the drums.

This letter is from Gilbert T. Walker to Charles Michie Smith being thankful for contribution to the annual summary and also he gave suggestion about the form of correspondence to keep together everything about buildings and spectroheliograph in separate file

This letter was sent to Charles Michie Smith from Gilbert T. Walker who was glad to pressed Slit Machine at once instead of indenting for it later on

This is a letter from Gilbert T. Walker to the Director of Kodaikanal and Madras observatories informing despatch of drum by post and a request for acknowledgement.

This is a letter from Gilbert T. Walker to Charles Michie Smith informing that there might be difficulty in getting clocks from the mathematical instrument department.