Correspondence with the Powers-Samas Calculating Machine Co., 1932-1938.
Correspondence with P. Ramsey-Kent, 1930-1931, concerned mainly with his 'Control Table of Logarithms'.
Correspondence with the Royal Geographical Society, especially A. Hinks, Secretary, 1933-1940, concerning the supply of almanacs for various expeditions to remote parts of the world.
Correspondence with R.O. Redman, Solar Physics Observatory, Cambridge, 1937-1938, concerning his stellar diameters programme and other matters.
Correspondence with the Royal Astronomical Society, 1929-1939, regarding the 'Free List', changes in typeface for publications, articles submitted for publication and nominations for the Fellowships of the Royal Astronomical Society. There is also a copy of L.J. Comrie's paper on Julius Bauschinger.