Frederick FitzClarence, 1841. 
Coloured lithograph by M and N Hanhart after Count Alfred Guillaume Gabriel d'Orsay, 1841.

FiztClarence was an illegitimate son of King William IV and his mistress, actress Dorothea Jordan. While a lieutenant in the Coldstream Guards, FitzClarence commanded a small detachment of Guards to act in support of the police with the arrest of the Cato Street conspirators in 1820. The arrest was not straightforward, and a scuffle ensued when Fitzclarence had his life endangered, Sgt. James Graham is recorded as the man who saved FitzClarence's life. On 24 May 1831 he was granted the rank of a marquess' younger son. He was also invested as a Knight Grand Cross of the Royal Guelphic Order (G.C.H.).