小编精挑细选的优选读物《一本书读懂福尔摩斯》，轻松有趣令人手不释卷！(7)

1895年11月第三个星期的星期四，福尔摩斯单调乏味的生活被他哥哥迈克罗夫特的来访打破了：他带来了一份秘密潜水艇计划消失的消息。这份十页长的计划有七页在卡多根·韦斯特身上找到了。卡多根·韦斯特是英国政府伍尔维奇皇家兵工厂的一个年轻职员，他的尸体在地铁阿尔盖特站的地下轨道被发现，头部已经严重碎裂。他随身物品有：很少的钱、戏票，奇怪的是没有车票。丢失的3页文件足以使英国的任何一个敌人制造一艘布鲁斯-帕廷顿潜水艇。
After an examination of the track near Aldgate, Holmes reaches an astonishing conclusion: Cadogan West had been killed elsewhere, was deposited
经过仔细检查阿尔盖特附近的轨道，福尔摩斯得出一个惊人的结论：卡多根·韦斯特是在别的地方被杀害的，被放到了一个火车顶部，然后在阿尔盖特轨道的道岔掉了下来。福尔摩斯决定拜访负责该文件的詹姆斯·沃尔特爵士。然而他也死了，他弟弟瓦伦丁上校说他是因为得知文件被偷名誉受损，心脏病突发而死。在离开阿尔盖特车站的时候，福尔摩斯发现地铁站的售票员说他在出事当晚见过卡多根·韦斯特，他当时惊慌失措地搭了去伦敦桥的那趟车。
Holmes identies a person of interest, Hugo Oberstein, a known agent who left town shortly after Cadogan West"s murder. Holmes and Dr. Watson break into Oberstein"s empty house and examine the windows, nding that the grime has been smudged, and there is a bloodstain. An underground train stops right under the window. It would be easy to lift a dead man onto a train roof, as was apparently done. Some messages from the Daily Telegraph agony column, all seeming to allude to a business deal, are also found,posted by "Pierrot", and this gives Holmes an idea. He posts a similarly cryptic message in the Daily Telegraph demanding a meeting, signing it Pierrot, in the hopes that the thief — assuming it is not Cadogan West —might show up at Oberstein"s house. It works. Colonel Valentine shows up and confesses to the theft of the plans, but swears that it was Oberstein who killed Cadogan West.