This item was about total solar eclipse of 18th August 1868. At Masulipatnam Pogson detected the hydrogen line emission, with a spectroscope. He saw a bright yellow line near the position of D lines of Sodium. The line originated from hitherto unknown element later termed as helium after the source of earliest detection. Hand coloured sketch of the solar spectrum during the Total Solar Eclipse of 1868. Hand coloured picture of the sun before and after the total solar eclipse 1868.

This item was about the high resolution line sketch spectra captured by John evershed during his experiment at Kodaikanal Observatory. While experimenting, he came across to capturing the high resolution spectra of Altair, Nova Aquila, Arcturus in the observatory. In this sketch, he pictured the resolution spectra that he observed as Umbra for high resolution and Penumbra for low resolution.

This item was about the Sunspot spectra taken by John Evershed, where he discovered that there is a radial outflow of gases in a sunspot. This effect is now known as the "Evershed Effect".

In continuation of letter S.D.O. 7867, it was informed that the grating had not yet been delivered, and the related information from contractors was also enclosed.

In this letter, it is stated that the tabulations might stop, although the instruments may be retained in action. It was mentioned that he sent the sunshine records also with others for tabulation in the Calcutta office.

This letter was about water vapour measurement made at Kodaikanal.

This letter was about the Tungston Arc Lamp with power supply is being sent through A.Manickam, as instructed by director. He was seeking acknowledgement for the same to make necessary entries in the stock book.

Thomas Royds wrote this letter to inform the Director General of Observatories that he had joined as the Director of Kodaikanal and Madras Observatories on August 3, 1913. It was sent from Kodaikanal in 1913.

This letter is about receiving two dark glasses which are not fit for eyepieces because it was too large

The letter is about the spectroheliograph building.