This collection consists largely of letters from Roger Casement to Captain Hans Boehm, during Casement's stay in Germany in 1915, as well as some associated material (photographs, medals) relating to his first contact with the German authorities in November and December 1914 and the formation of the Irish Brigade in 1915.

[Letter from Roger Casement, Frankfurt to Captain Hans Boehm, consisting mainly of the German Government's declaration of good will in relation to any possible invasion of Ireland.]

[Letter from Roger Casement (U.S. Consulate General, Munich) to Captain Hans Boehm, thanking him for his letter and for news of a messenger going to Ireland.]

[Letter from Thomas Olden (Ballyclough, Mallow) to William Frazer, regarding Olden's "History of the Church of Ireland"; and a belief in the existence of an island in the Atlantic, referred to by Washington Irving.]

[Letter from William Reeves (Parsonage House, Ballymena, Co. Antrim) to John O'Donovan, asking for assistance at translating an Irish text; O'Donovan's response, in which he comments on the current poverty, famine and unrest in Ireland.]

Letter to Seán Ó Súilleabháin from Pádraig Ó Fionnghusa, Cluain Meala, Co. Tpperary.

Letter to Seán Ó Súilleabháin from Seán Mac Mathghamhna, Luach, Dúlalinn, Co. Clare.

Letter from Ciarán Ó Síothcháin, Crathach, Oileán Cléire, Dún-na-Séad, Co. Cork, to Seán Ó Súilleabháin, 9 May 1945.

[Letter from Ciarán Ó Síothcháin, Crathach, Oileán Cléire, Dún-na-Séad, Co. Cork, to Seán Ó Súilleabháin, 27 August 1945]

Letter from Ciarán Ó Síothcháin, Crathach, Oileán Cléire, Dún-na-Séad, Co. Cork, to Seán Ó Súilleabháin, 27 October 1945.

[Letter to Seumas [sic] O'Delargy from Diarmuid Ó Cruadhlaoich, Cill Colmain, Inis Chiin(?) August 1945]

Letter from Mrs. A. Kirby, Stradbally, Co. Laois, to Sean O'Sullivan, 20 September 1945.

Letter from S. Nic Shiomóin, Delvin, Co. Westmeath, 18 September 1945.

[Letter from Seán Ó Caoimh to Seán Ó Súilleabháin of the Irish Folklore Commission.]

[Letter of Fr Philip O'Reilly OFM to Fr Luke Wadding OFM, Prague, with seal, 31st January 1652.]

Letter from Seán Ó Beirn, Malin, Lifford, Co. Donegal, to Seán Ó Súilleabháin [Irish Folklore Commission], 4 December 1945. Accompanies a response to a questionnaire compiled by the Irish Folklore Commission on the Irish Famine (1845-1852) in the province of Ulster.

Letter from R. Phelan, Kilmacoliver Ho., Pilltown, [Co. Kilkenny] [to the Irish Folklore Commission], 25 May 1945. Concerns a questionnaire compiled by the Irish Folklore Commission on the Irish Famine (1845-1852) in the province of Leinster; also a request for assistance in gaining a teaching position in Dublin.

Letter from Mrs. Jackson, "Cahir Abbey, Cahir, Co. Tipperary", to [the Irish Folklore Commission]. She apologizes that since she has retired from teaching, she is out of touch with "sources of Folklore Information", and returns some query forms [questionnaire?] sent to her. She suggests that her successor, Miss Irwin, at the Schoolhouse, Dundrum, Co. Tipperary may carry on the work. Dated 20 April 1945. Stamped: 21 April 1945.

Letter from John O'Dowd ('The Laurels', Westport) to the Folklore Commission, 12 November 1945. Included in a collection of responses to a questionnaire on the Irish Famine (1845-1852) in the province of Connacht. Stamped: 14 November 1945.

Letter from Cáit Ní Bholguidhir, Ráth an Iubhair, Enniscorthy, Co. Wexford, [to a member of the Irish Folklore Commission], 30 August 1945. Written in response to a questionnaire compiled by the Irish Folklore Commission on the Irish Famine (1845-1852) in the province of Leinster.

Letter from K. Delaney (Principal), "Inch N.S., Thurles, Co. Tipperary", to [the Irish Folklore Commission], regretting that he can give no help as regards to famine traditions in his district.

Letter from Máirtín Breathnach, Inistioge, Co. Kilkenny, to Sean O'Sullivan, 17 September 1945.

Letter from Máirtín Breathnach, Inistioge, Co. Kilkenny, to Sean O'Sullivan, 7 November 1945.

Letter from Tomás Ó Broin, 3 Ely Place, Galway, to Seán Ó Súilleabháin, 26 August 1945.