Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to M. le Secretaire, Academie des Sciences, Institut de France, Paris Letter of reply informing that Sir William Christie, K.C.b., FRS died at sea on January 22nd 1922 and that Professor J.C. Kapteyn, Foreign Member of the Royal Society died on June 18th 1922 at Groningen in Holland 20 October 1922