The illegitimate daughter of Lady Elizabeth Foster and William Cavendish, fifth duke of Devonshire; she married George Lamb in 1809.

CORRESPONDENCE OF Caroline Rosalie Adelaide Lamb [née St Jules] [Caro George]:

Mrs George Lamb to Lady Melbourne, [1816] in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Lady Byron to Caroline Rosalie Adelaide Lamb, 1 April 1816 in Astarte: a Fragment of Truth concerning George Gordon Byron, sixth Lord Byron (London: Christophers, 1921)