Patents appointing the 5th Earl Lieutenant and Custos rotulorum of King’s County in succession to his late father,
including two letters from [the Lord Lieutenant], Lord Aberdeen, on the subject (one of them making unsubtle reference to the necessity for the 5th Earl’s committing himself to political support of the government of the day), letters to the 5th Earl giving confidential opinions as to the suitability of various people for appointment as J.P.s, and a tradesman’s account for supplying a Lieutenant’s flag for Birr Castle. [Not in chronological order.]

Volume of drawings and specifications of pattern articles to be adapted in War Department works and buildings. Issued to Birr Barracks.

Photocopy of the lease of Lady Emily Alfred Howard-Bury to the Trustees for the Conn of the Hundred Battles No351 Branch of the Irish National Foresters Benefit Society for land and premises beside the Market Place and Market Square, Tullamore, known as 'The Shambles'. Terms for 99 years and subject to the yearly rent of £60. Includes map of premises.
Also includes photocopies of architectural drawing of the Foresters Hall, Tullamore prepared by T F McNamara (March 1923).

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).

Collection of photographs relating to Birr Barracks and the Leinster Regiment, many of which are reproductions of original photographs by William Lawrence and others. Contains an original group portrait King's County Rifles, Birr (1872), and several images of the Barrack Square. Also contains the only known image of the interior of the barracks, 'The Coffee Bar, Leinster Depot.'

Postcard of Birr Castle viewed from the river, purchased from Richard J Sheppard, Bookseller and Stationer, Birr, County Offaly.

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.

Poster advertising a carnival at Birr organised by the South Offaly Local Defence Force with dancing, parades and hurling tournaments.

Probate (1919) of the will (1918) of the 5th Earl, together with legal papers and costs in connection with the will and later accounts relating to the cost of repairing his memorial in St Brendan’s Church in Birr, and much later (2005-6) correspondence and accounts about having the memorial photographed in connection with the War Memorial Projects.