Promotional poster entitled 'Ireland's Solemn League and Covenant - A National Pledge'. Contains an anti-conscription pledge and features portrait photographs of the conference attendees at the Mansion House Conference. The pledge is signed by Alo O'Brennan, Tullamore, 1 June 1918.

Preprinted acknowledgment postcards sent by return by prisoners-of-war in German camps on receipt of relief parcels organised by the Birr Castle scheme. Personal details recorded include name, rank and internment camp.

Postcard featuring a copy of the original company mobilisation order of the Irish Volunteers, Dublin Brigade, signed by P. Egan, 23 April 1916.

Photograph album created by Lt. Col. M. O'Carroll Fitz-Simon, M.C. , who began his military career in Prince of Wales' Leinster Regiment, which was headquartered at Birr. The photographs document a peace-keeping mission the Leinsters undertook in Silesia (now part of Poland) from their departure at Dover on 31 May 1921, through Germany and to their destination of Oppeln (Opole in Poland today). Following the disbandment of the regiment in June 1922, Fitz-Simon joined the King's Own Regiment, Lancaster and the remaining photographs in the album depict scenes from missions in India and Burma. There is also a small number of photographs of people and houses in the Birr area including Whigsborough House, and the burnt out remains of Birr Barracks (following its destruction in the Civil War in July 1922).

Copy correspondence between two generations of Perkinson and Monaghan family members, all connected with Croghan, near Birr, Co Offaly and the Irish Hills area of the state of Michigan, USA. Following the devastation of the Great Famine, John Monaghan emigrated firstly to Suffolk and then to Michigan, where he received letters from his sister, Mary and her husband William Perkinosn, pleading for assistance to also enable their family emigrate to America. The correspondence describes the effect of famine and emigration on the Croghan area. Their son William, who emigrated to Lancashire, also writes to his cousin in Michigan of the second generation with much the same request.