First Group
- A. J. Huston to Yorke (1 p., TLS) — Aug. 7, 1941
- Yorke to Carl Purinton Rollins (1 p., typed carbon copy) — June 30, 1941
- Rollins to Yorke ( 1 ½ pp., TLS) — July 1, 1941
- Yorke to Rollins (1 p., typed carbon copy) — July 2, 1941
- Rollins to Yorke (1 p., TLS) — July 2, 1941
- Yorke to Rollins (1 p., typed carbon copy) — July 5, 1941
- Rollins to Yorke (ANS on postcard) — July 8, 1941
- Rollins to Yorke (1 p., ALS) — July 17, 1941
- Yorke to Rollins (1 p., typed carbon copy) — July 19, 1941
- Yorke to Rollins (1 p., typed carbon copy) — July 22, [1941]
- Rollins to Yorke (2 pp., TLS) — July 23, 1941
- Yorke to Rollins (1 p., typed carbon copy) — July 26, 1941
- Yorke to Rollins (1 p., typed carbon copy) — Aug. 4, 1941
- Rollins to Yorke (1 p., TLS) — Sept. 8, 1941
- Yorke to Rollins (1 p., typed carbon copy) — Sept. 13, [1941]
- Rollins to Yorke (ANS on postcard) — Sept. 16, [1941]
- Yorke to Rollins (1 p., typed carbon copy) — Sept. 17, 1941
- William Edwin Rudge to Yorke (1 p., TLS) — Sept. 25, 1941
- Yorke to Rudge (1 p., typed carbon copy) — Sept. 27, 1941
- Yorke to Rollins (2 pp., typed carbon copy) — Oct. 2, 1941
- Rollins to Yorke (TNS on postcard) — Oct. 6, 1941
- Yorke to Rollins (1 p., typed carbon copy) — Oct. 11, [1941]
- Yorke to Rollins (1 p. typed carbon copy) — Oct. 16, 1941
- Keith Huntress to Yorke (1p., TLS) — [Nov. 4, 1941]
- Yorke to Huntress (1 p., typed carbon copy) — Nov. 12, 1941
- Rollins to Yorke (1 p., TLS) — Nov. 18, 1941
- Yorke to Rollins (1 p., typed carbon copy) — Nov. 26, 1941
- Yorke to Rollins (1 p., typed carbon copy) — Dec. 29, 1941
- Rollins to Yorke (1 P., TLS) — Dec. 10, 1953
- Yorke to Rollins (1 p., typed carbon copy) — Dec. 11, 1953
Second Group
- Joanna C. Colcord to Yorke (2 pp., ALS) — Nov. 24, 1938
- Yorke to Colcord (1 p., typed carbon copy) — Nov. 28, 1938
- Colcord to Yorke (1 p., TLS) — Nov. 30, 1938
- Colcord to Yorke (1 p., ALS) — Dec. 4, 1938
- Yorke to Colcord (1 ½ pp., typed carbon copy) — Dec. 5, 1938
- Yorke to Colcord (1 p., typed carbon copy) — Dec. 8, 1938
- Yorke to Carlos Baker (1 p., typed carbon copy & undated ANS by Baker) — October 18, 1941
- Baker to Yorke (1 p., ALS w/ envelope) — Oct. 27, 1941
- Baker to Yorke (2 pp. TLS) — Oct. 29, 1941
- Yorke to Baker (2 pp., typed carbon copy) — Oct. 29, 1941
- Yorke to Baker (2 pp., typed carbon copy) — Oct. 31, 1941
- Baker to Yorke (½ p. ALS w/ 1 ½ pp. typed quotes]) — Nov. 5, 1941
- Baker to Yorke (1 p. ANS w/7 pp. typed quotes & card from Princeton Library) — Nov. 5, 1941
- Yorke to Baker (1 p., typed carbon copy) — Nov. 8, 1941
- Baker to Yorke (1 p., TLS) — Nov. 12, 1941
- Yorke to Baker (1 p., typed carbon copy) — Nov. 17, 1941
- Lawrence Thompson to Keith Huntress (1 p. typed letter unsigned w/ Baker ANS in red) — [Nov. 19, 1941]
- Yorke to Baker (1 p., typed carbon copy) — Nov. 22, 1941
- Baker to Yorke (1 p., TLS) — Nov. 25, 1941
- Yorke to Baker (1 p., typed carbon copy) — Dec. 9, 1941
- Yorke to Gilbert McC. Troxell (2 pp., typed carbon copy) — July 24, 1941
- Ttoxell to Yorke (1 ¼ pp., ALS) — Aug. 5, 1941
- Yorke to Troxell (1 ¼ pp., typed carbon copy) — Aug. 6, 1941
- Anne S. Pratt to Yorke (1 p., TLS) — Aug. 6, 1941
- Nicholas A. Salerno to Yorke (1 p., TLS w/ envelope)–July 25, 1967
- Yorke to Salerno (1 p., carbon copy)–July 30, 1967
- Nicholas A. Salerno to Yorke (2 ¼ pp., TLS)–August 1, 1967
- Yorke to Salerno (1 p., carbon copy)–August 4, 1967
- Yorke to Salerno (1 p., two carbon copies)–August 8, 1967
- Nicholas A. Salerno to Yorke (1 p. TLS)–Aug. 11, 1967
- Nicholas A. Salerno to Yorke (ANS w/ envelope)–Aug. 14, 1967
- Nicholas A. Salerno to Yorke (1 p. TLS w/ envelope)–September 7, 1967
- Yorke to Salerno (1 p., carbon copy)–September 28, 1967
- Nicholas A. Salerno to Yorke (1 p., TLS w/ envelope)–October 23, 1967
- Nicholas A. Salerno to Yorke (1 p., TLS w/ envelope)–January 17, 1968
- Yorke to Salerno ( ½ p., carbon copy)–January 30, 1968
- Nicholas A. Salerno to Yorke ( ½ p., TLS w/ envelope)–April 7, 1968