本文根据大量英文原始档案资料,叙述了西姆拉会议的首轮会谈过程,以及条约内容调整的情况,揭示了亨利·麦克马洪在西姆拉会议上提出划分所谓“内藏”和“外藏”的来龙去脉及其用意。作者兰姆教授对于麦克马洪参照内外蒙古划分内外藏的做法并不认同,并分析了其中的原因。文中将中国和西藏并举等这类西方学者普遍使用的错误提法,并不代表译者及本刊的观点,请读者明辨。 Based on a large number of original English archives, this article describes the first round of talks in Shimla and the adjustment of the treaty content. It reveals Henry McMahon’s proposed division of so-called “built-in” and “ ”Possession of possession " the ins and outs and its meaning. The author, Professor Lamb, disagrees with McMahon’s reference to the separation of inside and outside Tibet by reference to Inner and Outer Mongolia, and analyzes the reasons for it. The erroneous formulation commonly used by such Western scholars as China and Tibet simultaneously does not represent the views of the translator and of the press, but please discern readers.