[These three sentences are repeated from VII. §§ 12-14—in order to emphasize their importance, the commentators seem to think. I prefer to regard them as interpolated here in order to form an antecedent to the following words. With regard to local guides, Sun Tzŭ might have added that there is always the risk of going wrong, either through their treachery or some misunderstanding such as Livy records (XXII. 13): Hannibal, we are told, ordered a guide to lead him into the neighbourhood of Casinum, where there was an important pass to be occupied; but his Carthaginian accent, unsuited to the pronunciation of Latin names, caused the guide to understand Casilinum instead of Casinum, and turning from his proper route, he took the army in that direction, the mistake not being discovered until they had almost arrived.]