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).

Copies of approximately 1000 letters, averaging 1 per page. Some letters illegible due to fading. Contains many letters relating to ongoing sale of the Purdon Estate, Philipstown (Daingean) as well as letters relating to the Geashill Cattle Drive.
Includes letter to R. F. Barry, Esq., Crown Solicitor re The King v Adams and 45 others Geashill Case: 'I give you on annexed page particulars of the rail fare paid by the 45 defendants to take them to Kingsbridge for their trial in December last. There were 46 charged, but one, Thomas Hynes, was a prisoner and was conveyed up by the Authorities. Two witnesses were also brought up, namely, Father MacDonald and Dr. Barry of Philipstown, and both were examined. I also include their single fares. The accused and the witnesses had, of course, to be conveyed to Green Street, and I put £1 down for this though it would not probably nearly cover it as several of them took cars from the station. There can be no controversy however about the railway fares. I also give the figure of the return fares in case these are allowed. The parties had to come back, and as a matter of fact, were kept in Dublin two days; but I do not think these expenses are payable. I trust you will be able to kindly have whatever they are legally entitled to paid to them through me.' (29 March 1915)

Family, and family history, correspondence of the Hon. Geoffrey L. Parsons, including: a letter from his father, the 4th Earl, just before the latter’s death; letters from his brother, the 5th Earl, who writes from the Front during the First World
War, and a letter reporting that the 5th Earl has been seriously wounded; letters from Anthony de Brie, a portrait-painter, about his portraits of the 4th Earl and of Parsons’s wife; letters from Dr Otto Boeddicker offering items of antique furniture for sale; and an envelope of newspaper cuttings and other material concerning the family collected by Geoffrey Parsons, c.1915-55. [For letters to Geoffrey Parsons from his uncle, Sir Charles Parsons, see Section R.]