Sinn Féin, Fowler, J. H., & De Valera, É. (1924). Copy letter from Republican Department of Foreign Affairs accepting resignation of Brian Hannigan as its representative in Great Britain; with appeal from De Valera to Joseph H. Fowler, Thomas O'Sullivan and Art Ó Briain to promote unity amongst republican organizations in Great Britain.

Sinn Féin, et al. Copy Letter from Republican Department of Foreign Affairs Accepting Resignation of Brian Hannigan as Its Representative in Great Britain; with Appeal from De Valera to Joseph H. Fowler, Thomas O'Sullivan and Art Ó Briain to Promote Unity Amongst Republican Organizations in Great Britain. 1924.