Caverns Measureless to Man: 18 Memoirs of H. P. Lovecraft. The Kleicomolo (1919), Lovecraft (1921), H. P. Lovecraft: A Biographical Sketch (1935), After a Decade and the Kalem Club (1936), The Sage of College Street (1937), Howard Phillips Lovecraft: The Sage of Providence (1937), Amateur Affairs (1937), Howard Phillips Lovecraft (1937), A Master of the Macabre (1937), Idiosyncrasies of HPL (1940), Ave Atque Vale! (1940), A Few Memories (1940), Howard Phillips Lovecraft (1945), Interlude with Lovecraft (1945), The Ten-Cent Ivory Tower (1946), My Correspondence with Lovecraft (1958), Lovecraft as a Conversationalist (1958), and Caverns Measureless to Man (1975)

Kleiner, Rheinhart, George Julian Houtain, F. Lee Baldwin, E. Hoffman Price, Maurice W. Moe, Hymen Bradofsky, August Derleth, E. A. Edkins, Edward H. Cole, James F. Morton, Muriel E. Eddy, Stewart M. Boland, John Wilstach, Fritz Leiber, Samuel Loveman, and Kenneth Sterling