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This is a letter to Gilbert Thomas Walker in regards of time transmission.It informs about the time transmission signals which are received on a relay and further details surrounding it.

This fond contains correspondences related to time signals

This is a letter from the superintendent madras division to the director of Kodaikanal and Madras Observatories regarding special attention paid to the matter of time signal and it being sent from Department office of at Madurai to the Observatory.

This is a letter from the superintendent, observatory for surveyor general to the director of Madras Observatory to enquire about the value of 5hr.20mts.59.6secs.