This letter was related to speech delivered by Dr.M. K. Vainu Bappu, Director, IIA on the celebration of Silver Jubilee of Uttar Pradesh Observatory, Nainital, on 4th Novermber 1979

This letter was about Bok along with his wife was in India during the visit to State Observatory of Uttar Pradesh. He was grateful for the fine reception and gave many lectures, recommended some suggestion on the telescope and observatory.

This letter was about shifting the Lallemand cell to Kodaikanal that was started out from France as a gift to Dr.Bappu to carry out photoelectric work in the infra-red.

This letter was about shifting the Lallemand cell to Kodaikanal. He left a separate note to Dr.Sinvhal also in this matter. Dr.Bappu explained its origin and its journey from Paris to Nainital.