Dutton, C. B., Fowler, J. H., O'Callaghan, D., O'Brien, G., & Irish Self-Determination League of Great Britain. (1924). Papers of C. B. Dutton including report on efforts made to secure release of political prisoners, with statement of Geraldine O’Brien and E. O'Sullivan regarding interview with J. H. Fowler, letter of Fowler to McGrath and circular letter of Art Ó Briain and Seán McGrath on their release, announcing their intention to revive Irish Self-Determination League.

Dutton, Charles Bertram, et al. Papers of C. B. Dutton Including Report on Efforts Made to Secure Release of Political Prisoners, with Statement of Geraldine O’Brien and E. O'Sullivan Regarding Interview with J. H. Fowler, Letter of Fowler to McGrath and Circular Letter of Art Ó Briain and Seán McGrath on Their Release, Announcing Their Intention to Revive Irish Self-Determination League. 1924.