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The letter is to Sir Frank Dyson regarding a 16-inch coelostat that has been despatched to the agent for government consignments.

The letter was an acknowledgment of the photoheliograph received and experiences shared by using equatorial telescope to take solar photographs.

This letter was sent to the Astronomer Royal from John Evershed about the dispatch of the solar photographs and the double exposure plates for orientation in two separate parcels. Also mentioned the date and time of each photograph sent to him.

This letter was sent to John Evershed from F. W. Dyson, asking to forward the solar photographs for some specific dates.

This letter was sent to the Director of Kodaikanal Observatory from F. W. Dyson, acknowledging a list of photographs required to dispatch.

This letter was sent from the Astronomer Royal, Royal Observatory, Greenwich, F. W. Dyson, to John Evershed confirming that no photographs would be taken at Kodaikanal from July 1, 1915, until further notice.

This fond contains letters and documents related to the meteorology in Kodaikanal during 1898 to 1925