This letter was about M. K. Vainu Bappu's performance and his stay in Harvard College during his Ph.D. and he also received commendations from his guides, seniors and colleagues.

This Letter was about the M. K. Vainu Bappu's reprimand by the Hyderabad government for not adhering to his research on "Photoelectric Photometry of Eclipsing Variables".

This letter was a certificate from F.L.Whipple saying that M. K. Vainy Bappu completed on August 9, 1951 all of the formal requirements of the Department of Astronomy at Harvard College for the degree of Doctor of Philosophy in Astronomy.

This letter was about the request by Judge on the information of magnetic variation in the years 1877-1878 and also what it is now in Madura district.

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.

The letter is from the Executive Engineer Madura division to the Superintending Engineer VI circle Trichinopoly. It is regarding the work of the spectroheliograph building, requesting to comply with the indent for iron articles as no further progress can be made without it.

The letter specially mentions the report of Burma earthquake of 23rd May, 1912 that was missed in the consolidated earthquake report

The letter points out that the new wire which was inserted in the Photoheliograph on Nov.14, 1922, does not appear to be taut in its frame. The resulting irregularities make the measure of the Zero point a little uncertain.

The letter was an reply to Mrs. John Evershed saying that you enquired of my assistant about the name of "Evershed" as applied on lunar crater. Further he mentioned about its co-ordinates and enclosed the portion of the NASA map showing the crater named to it.

This letter is from E. Grant regarding an apparatus from the Cambridge Scientific Instrument Company which despatched to .S. "Mombassa" on 26th January , 1901