This letter was an acknowledgement for sending pump and bell jar. Evershed mentioned about getting the beautiful series of plates of the Spectrum of the iron arc in air and the centre of Sun's disk. He has written about reproduction of prominence photos the sample of work done by the Roorkee Coy., is suitable the screen used being very fine.

The letter was regarding the Sun charts prints that are not satisfactory as the negatives are imperfect. Therefore sending of original charts on cloth which are 26 inches in diameter are proposed by Evershed.

The letter was a confirmation of forwading a box containing 15 Sun charts which have been modified with the details of charts structure and required numbers of prints for each charts annually.

This letter was with reference to the telegram where mean areas giving better gauge of prominence activity than mean extent are discussed. It also encloses a table of mean areas from 1890 to 1921.

The letter discusses on the H and K wave-lengths and discusses the recent results that confirm the earlier results, exactly in the case of H and with a difference of 001 with K.

The letter was a reply to Evershed saying that there will be no difficulty in dealing with the 26 inch originals and requesting to provide necessary information.

This letter was about replying to C. M. Smith opinion on uselessness of a table in the solar article for the Monthly Weather Review.

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.

The letter is from Astronomer Royal, Royal Observatory, Greenwich, London, to The Director, Kodaikanal Observatory, Madras, India, requesting to send solar photographs of the mentioned dates as the photographs taken from there are deficient.

This Letter is from Astronomer Royal to the Director regarding sun photographs for 1911 May 19 and 20