The letter was from Charles P. Butler to John Eliot, the Meteorological Reporter to the Government of India and Director General of Indian Observatories, Simla, in 1903 about the broken-down condition of the fencing of rain gauge at Periyakulam station.

These photographic slides contain compressed pictures of the set-up of the astronomical instruments like Hydrometer, wind instrument, etc. at the top of Mt. Nimmu.

These photographic slides contain pictures of sightseeing on the way to Leh from Delhi. It contains survey pictures of the West hill of Mt. Nimmu and the base camp of Mt. Nimmu, the Himalayan ranges, and the set-up on the East hill of Mt. Nimmu.

This fonds consists of photographic slides associated with Ross Laboratory in Secunderabad. One of the images showcases a panoramic view of the Ross Laboratory, while the second image captures the Tableau Memorial dedicated to Ronald Ross.

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.

This is a letter from the director of Kodaikanal and Madras Observatories to the executive engineer madura special division. It states that a small shed is required at a distance of about 600 feet from the engine house for protecting the pump that supplies water to the generating plant and the observatory.

This Letter is from the Director, Kodaikanal and Madras Observatories to the executive engineer Madura special division on the assessment of the observatory building. In this letter the director is stating that the assessment on the observatory building adopted for water and drainage tax is the same as that which has been previously accepted for the house tax. These taxes were fixed after a lot of discussions in 1904 and was finally decided on a single sum being fixed for the whole of observatory buildings.

This is a letter from Solar physics observatory Kodaikanal to Gilbert T. Walker regarding building a new roof. It explains about the issues the roof has now and concludes with the fact that a new roof has to be built before long due to the corrugated sheeting and leakages caused thereby

This font is regarding public works in Kodaikanal Observatory

This letter is from consulting Architect to Government ordering the sanction for the expenditure for Govt. Astronomer's residence and quarters for the members