The letter is from John Evershed to Messrs Adam Hilger regarding an order for three 60-degree flint prisms of the highest defining quality, two pieces of plane glass highest quality surfaces with one side polished, two pieces of plane parallel blue or green glass of good optical quality transmitting blue light but absorbing violet and ultra-violet. The letter mentions that the bill should be sent to the Director General of Observations in Simla, India.

This letter was reply to letter D.O.No.2492 of 26th March 1923 mentioning that nothing very striking to send you in prominences. He sent copy of one of the best plates and 2 disc plates in K light to show rotation.

The letter was an instruction for using the repaired lens and asking to send a complete telescope to compare and make the repairing process simple.

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 an acknowledgement for the comet plate and dicussing to compare with the existing plates.

John Evershed, Director of Kodaikanal & Madras Observatory, wrote this letter to Gilbert T. Walker, assuming they might be getting the prism from Poona Observatory. He mentioned sending correspondence about the new micrometer and a specification. He devised another much simpler method of reducing moonlight comparable with 1st magnitude stars, which seems quite successful. He also proposed purchasing a Hartmann machine from private funds to save time and trouble.

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 contains information stating the return of 4-inch lens to Pocock and retaining of 15-inch lens to verify the Venus results.