Hyde, D., & Mac Neill, E. (1899). Letters and postcards to Eoin Mac Neill, mainly in Irish, regarding Irish poetry, grammar and its presence in schools, mentioning the publication 'An Claidheamh Soluis', the Literary Theatre, Eoin Mac Neill's ill health from overworking, and also discussing "Concannon" in County Mayo and the Pan-Celtic Conference.

Hyde, Douglas, and Eoin Mac Neill. Letters and Postcards to Eoin Mac Neill, Mainly in Irish, Regarding Irish Poetry, Grammar and Its Presence in Schools, Mentioning the Publication 'An Claidheamh Soluis', the Literary Theatre, Eoin Mac Neill's Ill Health from Overworking, and Also Discussing "Concannon" in County Mayo and the Pan-Celtic Conference. 1899.