The Delaval Papers are comprised of 72 items collected by Dr. William Hardcastle in the course of his research on the Delaval Family, mostly dating from the late 18th and early 19th Century. The papers are largely comprised of old bills with very charming bill heads - apart from a very scandalous and amusing pamphlet concerning Sir Francis Blake Delaval's attempt to get rid of his wife, Lady Isabella, by proving that she was in bed with a gentleman at Haddock's Bagnio.