This letter was about the Bappu's application for admission into Harvard Observatory and the formalities discussed by Harlow Shapley.

This letter was about M. K. Vainu Bappu's performance and his stay in Harvard College during his Ph.D. and he also received commendations from his guides, seniors and colleagues.

This letter was a certificate from F.L.Whipple saying that M. K. Vainy Bappu completed on August 9, 1951 all of the formal requirements of the Department of Astronomy at Harvard College for the degree of Doctor of Philosophy in Astronomy.

This letter was about M. K. Vainu Bappu should undertake research on "Photoelectric Photometry of Eclipsing Variables".