The letter certifies that P. R. Chidambara Ayer has been working in Solar Physics Observatory for the last ten years under the supervision of Thomas Royds. It mentioned that certificates related to education and work experience and copies of the thesis on " The distribution of Sun-spot in longitude" were also attached with the letter. It is an experience certificate for approval for submitting P. R. Chidambara Ayer's thesis.

The letter is from Thomas Royds, Ag. Director, Kodaikanal and Madras Observatories to the Superintending Engineer, VI circle, Trichinopoly, stating that other works in the observatory can be stopped except the reroofing of spectroheliograph for funds and ask not to postpone unless it's unavoidable.

The letter is from Thomas Royds, Ag. Director, Kodaikanal and Madras Observatories to the Superintending Engineer, VI circle, Trichinopoly, in continuation of letter no. Three hundred fifty-three asked when the pump installation would start and requested completion by the next dry season.

The letter is from Thomas Royds, assistant Director of Kodaikanal Observatories, to the editors of the astrophysical journal regarding a paper. It states that the manuscript of the paper on "The different character of spectrum lines belonging to the same series for its publication in the astrophysical journal.

This letter is regarding enclosing of a copy of the trace of the Milne Seismograph for the Turkestan Earthquake obstained at the Solar Physics Observatory

The letter is from V. Balakrishnan Pillai, Divisional Officer, Dindigul, to The Director of the Observatory, Kodaikanal, asking to instruct the Tahsildar o Periakulam about what is to be done with the barometer left at the Taluk Office and intimate the fact to him.

The letter is from Vipan, Sub-Division Officer, Kodaikanal, to The Director, The Observatory, Kodaikanal, returning with thanks for the paper regarding "Armco" iron sheeting.

This Letter is from W. Butler, the Director General of Stores to The Director about the forward of Microphotometer which had been received from Mr. Toepfer

This is a letter from W. C. S. Ingles to the director general of observatories requesting for a expert instrument repairer for the purpose of overhauling and if necessary for repairing a mean time clock.

This letter is from W. G. Butler to the Director General of Observatories enquiring the details of the focal length, etc of a single lens, 4" aperture for Kodaikanal Observatory