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.

This fond contains correspondences related to buildings in Kodaikanal

The fonds contain letters to the Director of Kodaikanal Observatory regarding different constructional plans and estimates.

This correspondence is related to half yearly return of Instruments at the Periyakulam Observatory which were in use on 31st March 1900

The fonds contain correspondence regarding various instruments and their reading in the Kodaikanal Observatory

The letter is about John Evershed and Kodaikanal to Kashmir Expedition

The letter is about John Evershed and some of Kashmir Observation

This fond is related to Nizamiah Observatory

This fond contains items from the proceedings of the Madras Government

The fond contain correspondence related to the building, as well as plans and estimates for the sliding roof of the spectroheliograph building.