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

This fond contains items related to the telescope purchased by Nawab Zafar Jung of Hyderabad.

This font is regarding public works in Kodaikanal Observatory

The fond contains correspondence related to Signaling Time from 1904 to 1923. It has letters from Thomas Royds, Gilbert T. Walker and the Director General of Telegraphs.

The letter is to the Executive Engineer enquiring whether there is an objection to building some meteorological building in the compound and proposing to the Govt. of India to build a house for the observer. The letter to the superintendent of the workshop was regarding providing materials to build a machine for the observatory. The letter to the pension superintendent asked for two pensioners to work as peons with pay of Rs.10/- each with quarters & warm clothing. The letter also mentions that people should be fit for the climate.

This item was an instrument used to measure time. A wire rope is wound around a drum which unwinds in a fixed time under gravity. A maker which moves horizontally, marks out the time elapsed on a linear scale. This instrument was used before the invention of the pendulum clock for Astronomical measurements at the Madras Observatory.

The letter is a Government Order forwarded to the Director of Kodaikanal & Madras Observatories informing about the sanctioning of Rs.6380 for the construction of a photoheliograph at Kodaikanal Observatory.

In this letter, it is stated that the tabulations might stop, although the instruments may be retained in action. It was mentioned that he sent the sunshine records also with others for tabulation in the Calcutta office.

This letter was about the BARC image convention and the M. K. Vainu Bappu's visit.

This letter was about water vapour measurement made at Kodaikanal.