O'Callaghan, D., Fowler, J. H., & Sinn Féin. (1923). Circular letter from Dail Eireann, Government of the Republic of Ireland, Minister for Foreign Affairs, Dómhnall Ó Ceallacháin, to Joseph H. Fowler advising him that Brian Hannigan has been appointed representative in England and asking for assistance of Fowler, C.B. Dutton and Fintan Murphy.

O'Callaghan, Donal, et al. Circular Letter from Dail Eireann, Government of the Republic of Ireland, Minister for Foreign Affairs, Dómhnall Ó Ceallacháin, to Joseph H. Fowler Advising Him That Brian Hannigan Has Been Appointed Representative in England and Asking for Assistance of Fowler, C.B. Dutton and Fintan Murphy. 1923.