Letter from P. S. O'Hegarty, Highfield House, Rathgar, Dublin, to Richard J. Hayes, with enclosed comments from Michael McDunphy on points raised by O'Hegarty regarding chronology and indexing - O'Hegarty, P. S. (Patrick Sarsfield), 1879-1955; Hayes, Richard J., 1902-1976; McDunphy, Michael, 1890-1971 (1951)
Keywords: Hayes, Richard J., -- 1902- -- Correspondence; Bureau of Military History, 1913-1921; National Library of Ireland; Ireland -- History -- 1922-