In my latest book, Dragons, Devils and Rebels, there's a chapter on what Chinese and westerners thought of each other in the early days of contact. The book's finished, but I've since been reading a biography of an Englishman who lived in Shanghai in the mid 1850's. To his shock, when he first arrived Shanghai had been overrun by rebels, and was under siege from imperial troops. Still, he was an intrepid traveller. One day he went on 'an interesting excursion' to Wusong, by boat down the Huangpu. He and…