《Battle for Beijing, 1858–1860 Franco-British Conflict in China》P156

On the 26th Elgin and Grant rode to Changkiwan to visit General Ignatiev. It turned out that the general had an excellent map of Beijing, on which every street and house of importance was shown. Mapping inside Beijing was, of course, offi cially forbidden, but the Russians did manage to produce a good map. It had apparently been drawn after the streets were measured by a cart from whose interior the street angles had been measured, while indicators were fixed to the wheels to count the number of revolutions, from which the distance covered could be calculated. That made it possible to give tangible help to the allies, since in the event of any attack on the city it would be helpful to have some idea of what or who – including the prisoners – was atwhat point of the city. Ignatiev allowed Hope Grant to copy that map in a photograph taken by the Italian freelance photographer, Felice Beato, who had accompanied the entire allied campaign.

26日，额尔金和格兰特骑马前往张家湾拜访伊格纳季耶夫将军。原来，将军有一张精美的北京地图，每一条重要的街道、房屋都标在上面。当然，在北京境内绘制地图是被官方禁止的，但俄罗斯人确实制作了一张很好的地图。它显然是在用一辆手推车测量街道后绘制的，从手推车的内部测量街道角度，同时将指示器固定在车轮上以计算转数，由此可以计算出行驶的距离。这使得向盟军提供切实的帮助成为可能，因为如果城市受到任何攻击，了解什么或谁（包括囚犯）在城市的哪个位置将会很有帮助。伊格纳季耶夫允许霍普·格兰特在意大利自由摄影师菲利斯·贝托拍摄的照片中复制那张地图，菲利斯·贝托陪同整个盟军战役。