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This letter was reply to the questions contained in the letter dated July, 1906, from Prof. Schuster on behalf of the International Union for Solar Research.

The letter is from Gilbert T Walker, Meteorological Reporter to the Government of India and Director-General of Indian Observatories to the Director, Solar Physics Observatory, asking him to send annually a statement of new Imperial works which will be needed during the ensuing year.

The letter is from Gilbert T. Walker to D. W. K. Barr informing that Michie Smith will examine the new telescope as soon as possible and his opinions are fully reliable.

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, discussing putting new piers, suggesting that the widening of doors may require big structural change. Hence, it might be given up. And about spectrum photography with the spectroheliograph.

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.

This letter was sent from Gilbert T. Walker to Charles Michie Smith regarding purchasing a slit-making machine, which they had made as an adjunct to the spectroheliograph. It's mentioned that sanction for the purchase of the machine has been sent home by telegraph by the Government of India, and Smith has to receive it in the case of Spectroheliograph.

this is a letter from Gilbert T. Walker to the Director of Kodaikanal and Madras observatories regarding the purchase of clocks. In the letter it states that one additional transit clock is provided considering the lack of clocks in Madras Observatory. It also consist of various recommendations which should be added to the report of the Madras Observatory.

The letter is from Gilbert T. Walker to Charles Michie Smith discussing about the enlargement of photos, the orientation of spectroheliograph, scientific instruments, and the sending of 'sun pictures' plates to Christie.

This is a reply letter from Gilbert T. Walker to the Director of Solar Physics observatory, Kodaikanal requesting for a special indent for the requests of clocks in the above letter. He also asks for precise details about the required clocks.

This is a letter from Gilbert T. Walker to Charles Michie Smith stating the inadequacy of the single clock at Madras for the time service. This letter asks for a detailed proposal for supplying the deficiency of clocks.