Collection: James Connolly Correspondence Letter ID: 453-page433 Date: 1910-09-27 Source: Between Comrades, James Connolly, Letters and Correspondence 1889-1916, Edited by Donal Nevin, Gill & Macmillan, Dublin 2007.
Collection: Selected Correspondence of Charles Ives Letter ID: 345 Date: 1939-05-30 Source: Tom C. Owens, ed. (2007). Selected Correspondence of Charles Ives. Berkeley: University of California Press.