Oriana won "a fine race" from Pirouette, with Lord Grosvenor's Donna Clara in third place.
Lord Grosvenor was strongly represented in the Derby at Epsom on 22 May.
He was made 6/4 favourite and won from Lord Grosvenor's John Bull filly and two others.
In 1825, Thomas Cubitt was contracted by Lord Grosvenor to develop Pimlico.
Lord Grosvenor is currently the only person in the line of succession to the dukedom of Westminster.
He was made odds on favourite, but finished second to Balance, a colt owned by Lord Grosvenor.
Meteora was retired from racing to become a broodmare at Lord Grosvenor's Eaton stud.
After graduation, he earned the patronage of Lord Grosvenor.
Lord Grosvenor's Truth had started as the 4/6 favourite, with King Fergus at 7/4.
He was withdrawn from the match and Lord Grosvenor paid a 300 guinea forfeit to Lord Foley.