The letters are arranged in chronological order in eight folders.
| Autograph letter signed, to MacMillian Co, 1934 May 4 | 1 p. | Box 1, F1 |
| Autograph letter signed, to Mr. Robarts, 1934 May 10 | 1 p. | Box 1, F1 |
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Enclosure: Autograph letter signed, from MacMillan to Yeats (copy handwritten by Yeats), 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1934 May 18 | 1 p. | Box 1, F1 |
| Autograph letter signed, to Mr. Robarts, 1934 May 24 | 1 p. | Box 1, F1 |
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Enclosure: Autograph letter signed, from MacMillan to Yeats (copy handwritten by Yeats), 2 pp. |
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| Autograph letter signed, to Mr. Robarts, 1934 May 30 | 1 p. | Box 1, F1 |
| Autograph letter signed, to Mr. Robarts, 1934 June 8 | 1 p. | Box 1, F1 |
| Autograph letter signed, to Miss Patee (Children's Book Dept. of MacMillan), 1934 June 20 | 1 p. | Box 1, F1 |
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Enclosure: Autograph letter signed, from Miss Patee to Yeats (copy handwritten by Yeats), 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1934 June 25 | 1 p. | Box 1, F1 |
| Autograph letter signed, to Mr. Robarts, 1934 July 3 | 1 p. | Box 1, F2 |
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Enclosures: Two Autograph letters signed, from Yeats to MacMillan and two Autograph letter signed, from MacMillan to Yeats (all copies handwritten by Yeats), 4 pp. |
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| Autograph letter signed, to Mr. Robarts, 1934 July 13 | 1 p. | Box 1, F2 |
| Autograph letter signed, to Mr. Robarts, 1934 July 17 | 1 p. | Box 1, F2 |
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Enclosure: Carbon copy of a typed letter signed, from MacMillan to Yeats, 3 pp. |
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| Autograph letter signed, to MacMillan Co, 1934 July 17 | 1 p. | Box 1, F2 |
| Autograph letter signed, to Mr. Robarts, 1934 July 19 | 1 p. | Box 1, F2 |
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Enclosure: Carbon copy of a typed letter (not signed), from Brett to Yeats, 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1934 July 25 | 1 p. | Box 1, F2 |
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Enclosure: Copy of document, "Understanding" between the Society of Authors and MacMillan & Co., signed by Yeats, 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1934 August 13 | 1 p. | Box 1, F3 |
| "Memorandum of Agreement" between Yeats and MacMillan, 1934 August 15 | 2 pp. | Box 1, F3 |
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Concerning The Big Tree of Bunlahy, signed by Yeats. |
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| Autograph letter signed, to Mr. Robarts, 1934 August 15 | 1 p. | Box 1, F3 |
| Autograph letter signed, to Mr. Robarts, 1934 August 17 | 1 p. | Box 1, F3 |
| Autograph letter signed, to Miss Bromley, 1934 September 17 | 1 p. | Box 1, F3 |
| Autograph letter signed, to Mr. Robarts, 1934 September 30 | 1 p. | Box 1, F3 |
| Autograph letter signed, to Mr. Robarts, 1934 December 30 | 1 p. | Box 1, F3 |
| Autograph letter signed, to Mr. Robarts, 1935 April 4 | 1 p. | Box 1, F4 |
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Enclosure: Autograph letter signed, from Raymond Crossett (Curtis Brown Ltd) to Yeats (copy handwritten by Yeats), 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1935 June 5 | 1 p. | Box 1, F4 |
| Autograph letter signed, to Mr. Robarts, 1935 June 6 | 1 p. | Box 1, F4 |
| Autograph letter signed, to Mr. Robarts, 1935 June 12 | 1 p. | Box 1, F4 |
| Autograph letter signed, to Mr. Robarts, 1935 September 20 | 1 p. | Box 1, F4 |
| Autograph letter signed, to Mr. Robarts, 1935 October 20 | 1 p. | Box 1, F4 |
| Autograph letter signed, to Mr. Robarts, 1936 May 4 | 1 p. | Box 1, F5 |
| Autograph letter signed, to Mr. Robarts, 1936 October 14 | 1 p. | Box 1, F5 |
| Autograph letter signed, to Mr. Robarts, 1936 November 9 | 1 p. | Box 1, F5 |
| Autograph letter signed, to Mr. Robarts, 1937 August 13 | 1 p. | Box 1, F5 |
| Autograph letter signed, to "Dear Sir", 1937 August 21 | 1 p. | Box 1, F5 |
| Autograph letter signed, to Mr. Robarts, 1937 October 22 | 1 p. | Box 1, F5 |
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Enclosure: Autograph letter signed, from John Deltmers to Yeats (copy handwritten by Yeats), 1 p. |
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| Autograph letter signed, to Mr. Robarts, 1938 January 19 | 1 p. | Box 1, F6 |
| Autograph letter signed, to Mr. Robarts, 1939 January 7 | 1 p. | Box 1, F6 |
| Autograph letter signed, to Mr. Robarts, 1940 May 11 | 1 p. | Box 1, F6 |
| Autograph letter signed, to Mr. Robarts, 1941 May 6 | 1 p. | Box 1, F6 |
| Autograph letter signed, to Mr. Griffin, 1941 May 24 | 2 pp. | Box 1, F6 |
| Autograph letter signed, to Mr. Griffin, 1941 June 30 | 1 p. | Box 1, F6 |
| Autograph letter signed, to Mr. Griffin, 1941 July 14 | 1 p. | Box 1, F6 |
| Autograph letter signed, 1942 February 5 | 1 p. | Box 1, F7 |
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To Mr. Robarts. |
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| Autograph letter signed, 1945 September 25 | 2 pp. | Box 1, F7 |
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To "Dear Sir" (someone from the Society of Authors). |
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| Autograph letter signed, 1948 May 27 | 1 p. | Box 1, F7 |
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To Miss Barber. |
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| Autograph letter signed, 1948 June 7 | 2 pp. | Box 1, F7 |
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To Miss Barber. |
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| Autograph letter signed, 1948 June 19 | 1 p. | Box 1, F7 |
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To Miss Barber. Enclosure: Carbon copy of a typed letter signed, from Miss Barber to Yeats, 1 p. |
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| Autograph letter signed, 1948 August 10 | 1 p. | Box 1, F7 |
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To Miss Barber. |
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| Autograph letter signed, 1950 June 22 | 2 pp. | Box 1, F8 |
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To Miss Barber. |
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| Autograph letter signed, 1950 July 14 | 1 p. | Box 1, F8 |
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To Miss Barber. |
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| Autograph letter signed, 1954 September 18 | 1 p. | Box 1, F8 |
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To Miss Barber. |
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| Autograph letter signed, 1955 November 15 | 1 p. | Box 1, F8 |
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To Miss Barber. |
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