This letter was a request regarding the present state of knowledge about the periodocity of sun spot activity.

This letter was a reply to the letter discussing definite periodicity in sunspot activity in the mean period being 11.12 years.

This letter was to inform John Evershed regarding holding the Pan-Pacific Science conference in Australia in August, 1923, and on behalf of the Council, the council desire to extend the invitation to the Madras Observatory.

This was a reply letter to W. Huggings kind letter of Sept.8th saying that it is very encouraging to know that our work here is appreciated by you. Then he wrote about radial motion in Sunspots, suggestion of Huggings in 1885, inclination of spectrum and finally climate conditions of Kodaikanal.

The letter was a critisism by Evershed on the assumption of radial outflow of gases with a velocity increasing with heigh above the photosphere, combined with a constant relativity effect.

This letter explained on Observatories Committee recommendation that sunspot spectra should be photographed in the first place and that visual observations were to be secondary in the year 1895 or at any rate before 1901. Since he could not find an original document on the subject, he has requested to provide the copy of the recommendations previous to 1901.

This letter was about sending a complimentary copy of their film, "Coronal Events". It shows most of the marked coronal activity recorded at Sacramento Peak Observatory by Howard DeMastus since 1956.

This letter was about the conversations of C. M. Smith on sunspot article.