He was the third son of
Charles Manners, 4th Duke of Rutland and Lady Mary Somerset, daughter of
Charles Somerset, 4th Duke of Beaufort. They were members of the Prince of Wales' set. He and his brother
Charles Manners were among the financial supporters of their friend
George Bryan Brummell, aka "Beau" Brummell, during his long exile in
Calais and
Caen. Lord Robert commanded the
10th (Prince of Wales's Own) Regiment of (Light) Dragoons (Hussars) during the
Waterloo Campaign. With a break of one year between 1831 and 1832, he represented various constituencies of the family interest in Parliament from 1802 until his death. He died suddenly in the afternoon of 15November 1835 at
Belvoir Castle, Leicestershire, and was interred in the estate's mausoleum. ==References==