Portrait study of Charles Edward Thomson, later Lord Sydenham, with a cat

Sir Thomas Lawrence, P.R.A. (1769-1830) Portrait study of Charles Edward Thomson, later Lord Sydenham, with a cat inscribed '"LORD SYDENHAM" 1840/Charles Edward Thomson/son of/John Thomson Esq/of/ROEHAMPTON/brother of Ellen Donovan of/FRAMFIELD PLACE SUSSEX/By Sir Thomas Lawrence 1801' (on a label attached to the reverse) pencil with touches of red chalk 12 x 9 in. (30.5 x 22.8 cm.)