Seamus O'Cassidy

1878? – 1943

• List of Books, Pamphlets, &c., Printed Wholly, Or Partly, in Irish, from the Earliest Period to 1820
• A typographical gazetteer of Ireland
• A typographical gazetteer of Ireland; or, The beginnings of printing in Irish towns
• The Irish language in Belfast and County Down, A.D. 1601-1850