拍品專文
The engraving depicts the H.M.S. Soudan, Albert and Wilberforce under steam and sail off Holyhead, shortly before their departure from England in May 1841, under the overall command of Captain (later Rear-Admiral) Henry Dundas Trotter. In 1840 Trotter was appointed Captain of the Albert steamer, commander of an expedition to the coast of Africa, for the examination of the Niger, and chief of the commission authorised to conclude treaties of commerce with the negro kings.