Portrait of George Canning, three-quarter-length, in a black coat, holding a letter in his right hand, by a column

John Graham-Gilbert, R.S.A. (Glasgow 1794-1866) Portrait of George Canning, three-quarter-length, in a black coat, holding a letter in his right hand, by a column inscribed 'G. Canning' (on plinth, lower right); and inscribed 'J. Gladstone[?] 18...6' (on letter, lower left) oil on canvas, unlined 50 x 40 in. (127 x 101.6 cm.) in a Victorian giltwood and gilt composition frame