From 1925-05-05 To 1964-08-16
- From Sean O'Casey to W. Van R. Whitall (1925-05-05)
- From Arthur Sinclair to Thomas King Moylan (1929-05-01)
- From Sean O'Casey to Paul George Konody (1931-01-06)
- From Sean O'Casey to Paul George Konody (1931-02-02)
- From Sean O'Casey to Thomas King Moylan (1931-02-28)
- From Sean O'Casey to Thomas King Moylan (1931-03-04)
- From Sean O'Casey to Thomas King Moylan (1931-03-06)
- From Sean O'Casey to Thomas King Moylan (1931-03-13)
- From Sean O'Casey to Thomas King Moylan (1931-10-19)
- From Sean O'Casey (1934-02-21)
- From Sean O'Casey to Katherine Gregory O'Casey (1936-04-20)
- From Sean O'Casey to Edward K. Barsky (1950-02-03)
- From Edward K. Barsky to Sean O'Casey (1950-02-24)
- Typescript letter signed from Sean O'Casey to H.F. Rubenstein about the galleys for his autobiography "Rose and Crown"
- A printed card giving O'Casey's new address
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- ALS from Sean O'Casey to H.F. Rubenstein
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- From Sean O'Casey to Douglas M. Jacobs (1955-01-30)
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- From Eileen O'Casey to Douglas M. Jacobs (1955-04-19)
- From Eileen O'Casey to Douglas M. Jacobs (1955-05-19)
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Typescript letter, signed, from Sean O'Casey to Mai McCarthy
- Typed letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Typescript letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- From Sean O'Casey to Douglas M. Jacobs (1959-10-12)
- Autograph letter, signed, from Sean O'Casey to Mai McCarthy
- Typescript letter, signed, from Sean O'Casey to Mai McCarthy
- Typescript letter, signed, from Sean O'Casey to Mai McCarthy
- Typescript letter, signed, from Mai McCarthy to Sean O'Casey
- Typed letter, signed, from Eileen O'Casey to Mai McCarthy