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

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 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.

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.

The letter was an reply to Mrs. John Evershed saying that you enquired of my assistant about the name of "Evershed" as applied on lunar crater. Further he mentioned about its co-ordinates and enclosed the portion of the NASA map showing the crater named to it.

This letter is from E. Grant regarding an apparatus from the Cambridge Scientific Instrument Company which despatched to .S. "Mombassa" on 26th January , 1901

The letter was written by E. C. J. Bond, the officer in charge No. 18 party (Magnetic), Survey of India, to the Director of the Madras and Kodaikanal Observatories, Kodaikanal, Via the Superintendent of the Trigonometrical Survey. Through this letter, E. C. J. Bond was conveying three suggestions to the magnetic observers to raise the calibre of the observatory magnet.

The letter was written by E. C. J. Bond who was the officer in-charge No. 18 party (Magnetic), Survey of India to the Director of the Madras and Kodaiknal Observatories, Kodaikanal. In this letter, he claims to have sent a registered parcel post to Kodaikanal that contained three strips of fine phosphor bronze fibre and four incredibly fine tungsten wires that could be used to suspend the magnetograph's declination. The letter was written in Dehra Dun in 1919.

The letter was written by E. C. J. Bond who was the officer in-charge No. 18 party (Magnetic), Survey of India to the Director of the Madras and Kodaiknal Observatories, Kodaikanal through the Superintendent of the Trignometrical Survey. Through this document, the author was inquiring how the tabulated data in the original and duplicate magnetic forms taken from Kodaikanal and delivered to the Survey of India office differed. Also provided are a few instructions for the observers. Letter was sent from Mussoorie in 1920.