Comprises materials relating to Sir Austen Henry Layard and his wife Lady Layard [Mary Enid Evelyn Guest]. Primarily consists of 2 boxes of letters from Enid Layard to her sister Charlotte Maria Guest [wife of Richard Du Cane] and a file containing a smaller number of letters from Sir Austen Henry Layard to same. Topics include Layard's work as a diplomat in Madrid and Constantinople, the Third Carlist War [1872-76], the Russo-Turkish War, and the Guest family. Also includes a file of pamphlets and newspaper clippings on subjects relating to the Layards and the death and funeral of Enid Layard, a file of pictures, and a file of additional materials relating to the Layard family. Also includes some items which belonged to Richard Du Cane.