His horses won the Derby on three occasions and the Oaks six times. His racing silks were yellow, with a black cap. In the 1760s, Grosvenor occupied Aubrey House, in the Campden Hill area of Holland Park. A London County Council blue plaque commemorates Grosvenor and other residents of the house. Family On 19 July 1764 Grosvenor married Henrietta Vernon, daughter of Henry Vernon of Hilton Park, Staffordshire; they had four sons. However, the marriage was not happy, and Henrietta had an affair with Henry, Duke of Cumberland, the younger brother of George III. The couple were discovered in flagrante delicto in 1769, which led to Grosvenor bringing an action against the Duke for "criminal conversation" (that is, adultery). He was awarded damages of £10,000, which together with costs, amounted to an award of £13,000 (£ in 2015). But Grosvenor was also known to be guilty of adultery himself, regularly seeking out prostitutes around Leicester Square, so he could not sue for divorce. The couple separated and he settled an annual allowance of £1,200 (£ in 2015) on his estranged wife, who entered the demi-monde and was a leading member of The New Female Coterie. Death Grosvenor died at Earls Court in 1802 and was buried in the family vault at St Mary's Church, Eccleston. His assets amounted to "under £70,000" (£ in 2015), but his debts were "over £100,000" (£ in 2015). In 1799 he (or his immediate family benefit trust) was estimated the wealthiest small family unit in Britain by a margin of 49%, owning £6.25M (). He was succeeded at Eaton Hall by his eldest son Robert. References 1731 births 1802 deaths People from Cheshire British racehorse owners and breeders Richard Grosvenor, 1st Earl Grosvenor Owners of Epsom Derby winners Grosvenor, Richard, 7th Baronet Grosvenor, Richard, 7th Baronet Fellows of the Royal Society Earls Grosvenor Peers of Great Britain created by George III