Letter from Mary Hayden to Padraic Pearse congratulating him on his appointment as editor of An Claidheamh Soluis and whether he will be able to take a few days from his "editorial labours" to visit Gorumna, circa 1903.

Letter from Mary Hayden to Padraic Pearse regarding the inclusion of documentation of arrests for drunkeness, increase of industries and number of feiseanna's held in the manifesto and also enquiring if Padraic Pearse can send on the addresses of Lady Gregory and Mrs Costelloe, undated.

Letter from Mary Hayden to Hanna Sheehy-Skeffington, regarding Hayden's address at a meeting of the Irish Women's Franchise League, 1914 Sep. 28.

A short history of the Irish people :

Part I.- From the earliest times to 1603 : Part II.- From 1603 to present time /

Letters to Patrick Pearse from Mary Hayden, undated.

Letter from Mary Hayden to Padraic Pearse regarding having written to Mrs MacDonagh requesting whether she would lower her terms and also the options for additional hotels that are conveniently located to Cliftin [Clifden], including Letterfrack and Gorumna in Connemara, undated.

Letter from Mary Hayden to Padraic Pearse thanking him for the ticket to his lecture, however informing him she is unable to go due to an arrangement with a friend to go to the National Literary Society and also enquiring if he will be attending an evening event at the Alexandra [College?], undated.

Letters from S.J. William, and John and Mary Hayden regarding Irish grammar and spelling, founding a branch of the Gaelic League in Galway and the teaching of Irish in university, 1893-1918.

Letter from Mary Hayden to Padraic Pearse regarding the health of Mr. Russell whom she met at the station and also her own health matters, undated.

Letter from Mary Hayden to Padraic Pearse apologising for bothering him in regards to the books she requires and also enquiring if he heard Edward Martyn's "grunts of contempt" regarding remarks she made, undated.

Diaries of Irish historian Mary Hayden, covering the years 1878 to 1903, dealing mainly with her life in Dublin but also including accounts of visits to Greece, 1890-1892 and an account of a meeting with Patrick Pearse in Connemara in January 1903, 1878-1903.

Deus meus adiuva me /

Letter from Mary Hayden to Padraic Pearse regarding having received a letter from Mr. Russell in London enquiring as to whether Padraic Pearse could take his class that morning and also whether he would like to join Mother Patrick of St. Mary's College to an Irish concert, circa 1903.

Letter from Mary Hayden to Margaret Pearse enclosing an article (not included), about Padraic Pearse that will fit in Margaret Pearse's purse in case she is searched and explaining that she could not in good conscience help with the Easter Rising, 1916 June 11.

Letter from Mary Hayden to Hanna Sheehy-Skeffington, regarding the publication of her work, 1914 Oct. 27.

Letter from Mary Hayden to Padraic Pearse thanking him for his kind rememberance and the book, of which she mentions is quite a wonderful production in every way for a boy of seventeen, undated.

Letter from Professor Mary Hayden, 16 Rathmines Road, Dublin to W. A. Henderson, 1915 July 12.

Letter from Mary Hayden to Francis Sheehy Skeffington regarding his resignation as registrar of University College Dublin, [1904] Sept. 7.

Letter from Mary Hayden to Francis Sheehy Skeffington discussing an election, 1909 Oct. 7.

Letter from Mary Hayden to Padraic Pearse apologising for missing him and expressing her sadness at having to bow to Mrs MacDonagh after what she said to her regarding her terms, undated.