PORTRAIT OF ADMIRAL SIR JOHN THOMAS DUCKWORTH, 1ST BARONET (1748 - 1817), THREE-QUARTER LENGTH, IN NAVAL UNIFORM, WEARING THE BREAST STAR AND SASH OF THE ORDER OF BATH-SIR-WILLIAM-BEECHEY-R.A.- (海军上将约翰·托马斯·达克沃斯爵士的肖像,第一男爵(1748-1817),四分之三长,穿着海军制服,戴着巴斯勋章的胸星和腰带-威廉·比奇爵士-)