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The fond contains correspondence related to Signaling Time from 1904 to 1923. It has letters from Thomas Royds, Gilbert T. Walker and the Director General of Telegraphs.

This fond contains materials related to John Evershed that contains general local office materials including letters of all local government and administrations, proceedings, reports to the government of India etc., A large portion of the collection series contains information on observations from various scientists.

The fond contains documents of Thomas Royds, the past director of Kodaikanal Solar Observatory. It consists of mainly official letters, administrative documents, pay slips and handwritten documents related to Thomas Royds.

The album contains photos related to the Solar Physics Observatory at Kodaikanal during Dr Anil Kumar Das's directorship. It was established in 1899 as a Solar Physics Observatory, and all the activities of the Madras Observatory were shifted to Kodaikanal. The photographs in this album illuminate the critical events in the history of the Kodaikanal Observatory from 1946 to 1955. The visit of eminent scientists and astronomers, official meetings and conferences, celebrations, and farewells and staff of the observatory during the period can be seen in the album.

The album contains photographs related to the professional and personal life of John Evershed, particularly in India, Australia, and England, from 1909 to 1953. The album shows different events such as John Evershed using a spectroheliograph at Kodaikanal, camp life in India, Evershed with his wife at Kashmir, a group photo including Evershed, Thomas Royds, and the Kodaikanal Observatory staff, the visit of Evershed for his research at Srinagar, Kashmir, and Wallal, a photo of Evershed and his signature. At the album's end, the photo of his old age at Highbroom and Heath cottage with his pet dog- Brock, has also been archived.

The album contains archival documents related to John Evershed, a brief biography, photographs, scientific discoveries in astrophysics, drawings, and sketches of observations from the Kodaikanal Solar Physics Observatory. The album starts with a crisp description of the life of John Eveshed. The photographs in the album are based on the following themes: the mechanical workshop and the spectroheliograph, the plaque installed in 1975 in Kodaikanal to commemorate the discovery of the Evershed effect, observatory buildings, and Evershed with the Kodaikanal Observatory staff. In addition, a detailed description related to the Evershed effect is reproduced from bulletin No. XV(1909) of Kodaikanal Observatory, a photo of Halley's comet and a picture of the moon hand-drawn by Evershed, spectra of nova aquilae in 1918, pencil sketches by Evershed on the solar prominences are preserved in this album. Each item is provided with captions.