We found William Dampier by chance. He was a small footnote in a book about buccaneers – those ‘original pirates of the Caribbean’ – which mentioned that there was a painting of him in the National Portrait Gallery. This seemed a strange outcome for a man who had pursued such a violent career and my husband and I went to see the picture. Entitled William Dampier – Pirate and Hydrographer, it shows a lean, strong-featured man with brown, shoulder-length hair and a watchful expression. There are no earrings, cutlasses or other Jack Sparrow-type flourishes. Instead, Dampier is wearing a plain coat with a white neck-cloth and holding a book, gold-tooled spine out, towards the onlooker.