This is a correspondence of the specifications for an observatory dome 18 feet in diameter regarding the previous letter. Here some hand drawn sketch of a dome specifications also included as reference.

This is a document containing the list of instruments available in the store at Kodaikanal Observatory as of November 1925

A thanksgiving letter to Simpson for the data of a) Black bulb for the year, b) minimum on rass for year, c) sunshine January to April

This is a completion certificate for the north dome of the observatory

The letter is from W.B. Gorbon to different departments regarding the revision of the charge on account of upkeep of electrical installations, stating that with effect from 1st April 1912, the charge for repairs shall be assessed at the rate of 5 percent per annum on the capital cost of installations.

The fond contain correspondence regarding the Astronomical Observatory at Lahore. The letter is from the Director of Kodaikanal & Madras Observatories to the Registrar, Panjab University, Lahore, giving suggestions for the proposed Astronomical Observatory to be built in Lahore. The letter has suggestions about transit instruments and a 7-inch equatorial telescope. A sketch of the roofing complex is also attached.

This Fond is related to Magnetic Observatory of Kodaikanal

The fond contains correspondence related to the Periyakulam Observatory.

The fond contains correspondence regarding the water pump and pump house in Kodaikanal.

The fond contain correspondence between the Executive Engineer, Superintending Engineer, Director of Kodaikanal & Madras Observatories, and the Director General of Observatories regarding various constructions and alterations in the Kodaikanal Observatory building.