Correspondence with Douglas Hyde relating to Connradh na Gaeilge matters, as well as personal correspondence on occasion. Born in 1860, and from the 1870s had an interest in the Irish language, folklore and antiquarianism. A student at TCD, he later became president of Connradh na Gaeilge in 1893, until his resignation in 1915 as the organisation became more nationalist in outlook, concentrating on his academic career as Professor of Irish at UCD, later becoming the first President of Ireland in 1937. He died in 1949.

Letter from S.J. Barrett, 24 O'Connell St. Upper, to An Craoibhin asking for his subscription. Reply at bottom of letter enclosing 10s. and apologising for the delay, he is doing a paper on "loin-mheadhonach"[in Irish].

Letter from An Craoibhin, 1 Plas an Iarla, to Stephen Barrett thanking him for helping Nuala. He says that Fr. O Cuahain and Dr. Brennain came to "An tSochraid" which was a great success [in Irish].

Letter from An Craoibhin, 35 Harcourt St., Baith-Ath-Cliath to An Bairreadach, Connradh na Gaeilge, congratulating him on his wedding [in Irish].

Letter from An Craoibhin, Ratra, Frenchpark, County Roscommon sending him and his family season's greetings.

Letter from An Craoibhin, 43 Upper Mount St., Blaclaith, to Stiophán Bairéad, saying that he got his letter from Padraigh O Dailaigh and would do what was required of him. He commiserates with him on the death of his son and says, "Tamuid ro-fhada ag obai

Letter from An Craoibhin, 1 Earlsfort Place, Dublin to Stiophán Bairéad stating that he cannot get to the bank at present but has written to the accountants explaining the delay [in Irish].

Letter from An Craoibhin, 1 Earlsfort Place, Dublin to Stiophán Bairéad, Cisteoir Connradh na Gaeilge, 25 Cearnog Parnell, Baile Átha Cliath, hoping that the New Year will bring him happiness [In Irish].

Letter from An Craoibhin, Ratra House, Frenchpark, County Roscommon, to Stiophán Bairéad, Connradh na Gaeilge, 25 Rutland Square, Dublin hoping he is looking after himself "Nach aiat iad na n-amanta so!" [in Irish].

Letter from An Craoibhin, 1 Plas Cuirt an Iarla, Dublin, enclosing money from Ui Maoluiaidh "Ta suil le dia agam go bhi tu go maith" [in Irish].