The letter is from C. J. Ussher, Superintending Engineer VI th circle, Trichinopoly, to the Director of Kodaikanal and Madras Observatories forwarding the estimate for constructing the Photo-heliograph building with a dark room and a porch at Kodaikanal asking for countersignature and return.

The letter is from C. J. Ussher, Superintending Engineer VI th circle, Trichinopoly, to the Director of Kodaikanal and Madras Observatories. It is a letter forwarding the fresh plans with an estimate amounting to Rs.14000 for the construction of photo spectroheliograph buildings at Kodaikanal, which has to be countersigned and then submitted to the government for sanction.

The letter is from Gilbert T Walker, Meteorological reporter of the government of India and Director General of Indian observatories, to Charles Michie Smith, Director of Solar Physics Observatory, regarding the spectroheliograph amplifier, the distance of the mirror, enlarging lens, and building of the new piers.