The fond contains correspondence related to the Periyakulam Observatory.

The letter is from the Acting Collector of Madura to the Director of Kodaikanal & Madras Observatories requesting to instruct the officer in charge of the Periyakulam Observatory to hand over the rain gauge to the Tahsildar of Periyakulam.

The letter is from Charles P. Butler, Ag: Director of Kodaikanal & Madras Observatories, to the Executive Engineer, Madura, requesting to authorize the erection of a new rain-gauge pillar in the Thermometer Shed at Periyakulam. He also gives information on the pillar.

This letter is from Charles. P. Butler, Ag: Director, Kodaikanal & Madras Observatories to the Meteorological Reporter to the Government of India & Director General of Indian Observatories, Simla, informing about the report from the observer at the Periyakulam station, that the fencing around the rain gauge is dilapidated and suggesting to remove the rain gauge to the enclosure of the thermometer shed as the distance from the current site to shed is about 50 yards but it may not be a serious difference from the records.

The letter is from Charles P. Butler Ag: Director of Kodaikanal & Madras Observatories to the Executive Engineer, Madura, requesting to supply a set of stones mentioned in the letter for the use of the assistants and peons of the Kodaikanal and Periyakulam Observatories.

The letter is from Charles P. Butler, Ag: Director of Kodaikanal & Madras Observatories to the Meteorological Reporter to the Government of India & Director Deneral of Indian Observatories in continuation of his letter No.480, requesting to supply one rain measuring glass for 5-inch gauge to Periyakulam Observatory.

The letter is from Charles P. Butler, Ag: Director of Kodaikanal & Madras Observatories, to The Sub-Divisional Officer, Public Works Department, Dindigul, requesting to arrange with the officer in charge at Periyakulam for collection of sufficient materials for building one small standard base for rain-gauge in the compound of Taluk Cutchery. He wishes that the arrangements be made by when he goes down to Periyakulam And requests to inform him when the preparations are ready.

The letter is from Gilbert T. Walker to Charles Michie Smith asking about the dismissal of the Periyakulam as the performance of the observer was unsatisfactory, like tampering with the records. He asks to reply in a short wire by telegraph.

The letter is from Gilbert T. Walker to The Director of Kodaikanal & Madras Observatories requesting to inform whether the instruments- "Richard's Barograph" and "Do Thermograph" -are still in use at the Periyakulam Observatory and also the dates on which each of these instruments were brought into use at the observatory. The sheet also has the reply to it, which says the instruments were brought on 1st March 1901 and were still in use.

The letter is from Solar Physics Observatory to P. N. Sankarakrishna Aiyar, Meteorological Observer, Periyakulam, informing about the closing of Periyakulam Observatory at the end of that month under the instructions of the Director General of Observatories and also the observer's services will be disposed at the end of a month from that day.