All of these essays may be found in Collected Essays, Volume 5: Philosophy; Autobiography & Miscellany from Hippocampus Press. Dates are first publication dates unless otherwise indicated.

• The Brief Autobiography of an Inconsequential Scribbler (April 1919)
• A Confession of Unfaith (February 1922)
• [Diary: 1925] (written 1925–1926; 2006)
• [Commercial Blurbs] (written June–July 1925; Spring 1988)
• Cats and Dogs (23 November 1926; Summer 1937)
• Notes on Hudson Valley History (written late 1930; 2006)
• Autobiography of Howard Phillips Lovecraft (written early 1930s; October 1941)
• In Memoriam: Henry St. Clair Whitehead (March 1933)
• Some Notes on a Nonentity (written 23 November 1933; 1943)
• Correspondence between R.H. Barlow and Wilson Shepherd of Oakman, Alabama–Sept.–Nov. 1932 (written spring 1936; Fall 1986)
• In Memoriam: Robert Ervin Howard (September 1936)
• Commonplace Book (written early 1920–1935; 1938)
• Instructions in Case of Decease (written late 1936 or early 1937; Fall 1985)
• [Diary—1937] (written January–March 1937; 1987)