This series contains personal materials of Dr. Carruthers not directly relating to aeronautics. The biographical materials consist of an interview with Dr. Carruthers published in the December 1957 issue of The Limb, and a negative photostat of an undated resolution by the Board of Governors of Town Hall honoring Dr. Carruthers.

Correspondence in the series consists of a 1958 letter from Gianni Caproni di Taliedo concerning a book Dr. Carruthers intended to write, and letters and other materials, 1931-1932, concerning the mural painter Violet Oakley (1874-1961), whose work Dr. Carruthers wished to have exhibited at the University of Southern California.

Miscellaneous materials include a copy of a poem attributed to Robert Burns, beginning "My lord, I would not fill your chair, / Though ye be proudest noble's heir"; a civil war envelope with the legend "Cease Viper, you bite a file", picturing a snake with the words "Jeff Davis" coiled around a file with the word "Union" (cf. Georgetown University, Roosevelt Civil War Envelopes Collection, p. 111, image 3 (http://aladinrc.wrlc.org/handle/1961/1916)) [accessed 23 May 2011]); and a hand-colored photograph of the Minute Maid Corporation's "World Peace" float in an unidentified Tournament of Roses parade, in Pasadena, CA.

A small number of postcards depict the Houghton Library, Harvard; the receiving ship at Norfolk, VA; Juan-les-Pins, Cote d'Azur, France; the Deutsche Ostmesse in Königsberg, East Prussia; a landscape near Tromso, Norway; and two pieces of sculpture by Danish neoclassical sculptor Bertel Thorvaldsen (ca. 1770-1844). The series also contains 4 original prints by Leo Katz, 1937-1941; engraved portraits of John Calvin, Galileo Galilei, and Jesus Christ; two hand-colored maps from Herman Moll's 1711 Atlas geographus; a negative photostat of Amos Dolittle's "Display of the United States of America", 1794; Dartmouth College; a color reproduction of Norman Wilkinson, "A Great 'Opposed Landing' Suvla Bay, 1915, ..."; color prints of V. Spahn's "Le chauffard", 1907, and George S. Eisenberg's 1943 painting of the USS LaVallette; 2 copies (signed by Aristide Briand and Arthur Henderson) of Derso & Kelen's 1930 menu card lampooning the members of the League of Nations 11th Assembly; and a caricature of Lord Cecil, a supplement to the Spectator, February 21, 1931.