This letter was about the reply to the earlier circular, stating that the date of reading is given back of the sheet, thermograph cage and the number of dry and wet bulb thermometers.

The letter was from Charles P. Butler to the Officer Commanding Royal Engineers informing him that the nearest railway station where recent magnetic declination observations were made is Perambur Station, located 4-5 miles from Fort St. George. He provided the latitude, longitude, and magnetic declination for this location.

The document is a letter from Charles P. Butler to Gilbert T. Walker, the Meteorological Reporter to the Government of India and Director General of Indian Observatories, Calcutta, in 1903. The document conveys that the Kodaikanal Observatory had received the case containing eight thermometers and one rain glass for five gauges that the meteorological department had delivered.

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.

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.

The item is a letter to inform Deputy Tahsildar, Kodaikanal that rainfall returns daily, weekly, and monthly have been sent to the collectorate as per the request of the Collector.

This is a letter from Charles. P. Butler, Ag: Director, Kodaikanal & Madras Observatories to Executive Engineer Madura regarding some construction needs at the Solar Physics Observatory, like a permanent building to hold the 4-inch photoheliograph, a glazed verandah for keeping the north-western side of the observatory dry, an open verandah for the Bookbinder's shed and quarters for the writer of the observatory, on which the details will be given later when the decision is finalised.

Charles P. Butler sent this letter to Gilbert T. Walker on installing a spectroheliograph in the Kodaikanal Observatory. The letter was sent from the Royal College of Science, London, on 3rd June 1904.

The document is a letter asking The Meteorological Reporter to send sunlight cards to Kodaikanal and Madras Observatories.

The item was to inform The Meteorological Reporter to the Government of India and Director General of Indian Observatories that the specimens of the sunshine cards printed from Lawrence Asylum Press, Madras, during each year 1901-02 and 1902-03 have been sent to the office as per the request.