Contains one letter dated January 21, 1963 and addressed to "My Dear Jean" from Dion Calthrop Clayton regarding his book. Underneath the body of the letter is a drawing in black ink of a person blowing on a trumpet. There is also a separate, folded leaflet included with the letter titled, "In Memoriam 1881-1937". Inside the leaflet is a black and white profile shot of Calthrop.