The letter is from H.B. Peirce, General Superintendent, Public Works Workshops, to the Director of Kodaikanal Observatory, requesting to let know at earliest convenience the exact distance between the rails of the sliding roof of Kodai Observatory lately supplied by the shops.

The letter is from H.B. Peirce, General Superintendent, Public Works Workshops, to The Director, Kodaikanal & Madras Observatories, with reference to the gearing arrangements for moving the roof over the Spectro Heliograph enclosing a plan of arrangements available in shops. He requested to fill the measurement where it is marked 'X' and let know the length of the rack as early as possible.

This letter was about the indent raised by C. M. Smith, Kodaikanal Solar Observatory that includes Plates for the Spectroheliograph, Ilford Special Rapid, Sandell Special Extra, Imperia Flash Light, Imperipecial Special Rapid.

This letter was about the spectroheliograph, observations of widened lines in Sunspot spectra and prominence latitudes and frequencies.

This letter was about a drawing of the spectroheliograph that was received at Gilbert T. Walker from the Cambridge Scientific Instrument Company.

This letter was about the continuation of the delayed telegram of 30th May 1905. It also contains the recommendation of the observatories committee & relating to spectroheliographic work.

The letter is from Gilbert T. Walker, Director General of Observatories, to The Secretary to the Government of Madras, P.W.D, Madras, reporting that no works on which expenditure is imperial and not less than Rs.2500/- will be required during the ensuing year. And requested funds from 1917-18 for the special repairs of the roof of the spectroheliograph building.

The letter is from Gilbert T. Walker, Director General of Observatories to The Secretary to the Government of Madras, P.W.D, Madras, forwarding duly approved and countersigned plan and estimate of Rs. 2340/- for special repairs to the roof of the spectroheliograph building at Kodaikanal. Also adding, if it's not convenient to provide the funds during 1916-17, the work may be carried out in the year 1917-18 before cold weather.

The letter is from Gilbert T. Walker to Charles Michie Smith regarding reproducing spectroheliograms at home. It states that a sanction would be required from the government and suggests including as many firms as possible with the approximate cost.

The letter is from the Executive Engineer to John Evershed informing that no intimation has been received that the funds required for the spectroheliograph building have been placed at his disposal and, hence, regretting that he can't start the work.