Collection: T. S. Eliot Letters 1898-1922 Letter ID: 672 Date: 1922-04-23 Source: Valerie Eliot and Hugh Haughton, ed. (2011). The Letters of T. S. Eliot. Vol. 1, 1898–1922. London: Faber and Faber.
Collection: James Joyce Letters Letter ID: vol3p41a Date: 1921-04-23 Source: Letters of James Joyce. Vol. 3. Edited by Richard Ellmann. London: Faber & Faber, 1966.
Collection: T. S. Eliot Letters 1898-1922 Letter ID: 302 Date: 1919-04-23 Source: Valerie Eliot and Hugh Haughton, ed. (2011). The Letters of T. S. Eliot. Vol. 1, 1898–1922. London: Faber and Faber.
Sender Address: 18 Crawford Mansions, Crawford Street, W.1, London
Collection: Patrick H. Pearse Letters Letter ID: L.416/NLI Date: 1916-04-23 Source: The letters of P.H. Pearse, Edited by Séamus Ó Buachalla, Gerrards Cross, Bucks.: Smythe, 1980.
Sender Address: St Enda's School, Cullenswood House, Rathmines, Dublin
Collection: Patrick H. Pearse Letters Letter ID: L.417/P.Ms. Date: 1916-04-23 Source: The letters of P.H. Pearse, Edited by Séamus Ó Buachalla, Gerrards Cross, Bucks.: Smythe, 1980.
Collection: Patrick H. Pearse Letters Letter ID: L.60/P.Ms. Date: 1902-04-23 Source: The letters of P.H. Pearse, Edited by Séamus Ó Buachalla, Gerrards Cross, Bucks.: Smythe, 1980.
Sender Address: The Gaelic League, 24 Upper O'Connell Street, Dublin
Collection: James Joyce Letters Letter ID: vol2p7a Date: 1900-04-23 Source: Letters of James Joyce. Vol. 2. Edited by Richard Ellmann. London: Faber & Faber, 1966.
Sender Address: 2 Vernon Chambers, Southampton Row, W.C.
Collection: Karl Marx and Frederick Engels Correspondence 1870-1895 Letter ID: 217p360v44 Date: 1872-04-23 Source: Karl Marx and Frederick Engels: Collected Works. Vol. 44. London: Lawrence and Wishart, 1989