Yeh Shui-hsin represents Ssŭ-ma Ch‘ien as having said that Sun Wu crushed Ch‘u and entered Ying. This is not quite correct. No doubt the impression left on the reader’s mind is that he at least shared in these exploits; but the actual subject of the verbs 破, 入, 威 and 顯 is certainly 闔廬, as is shown by the next words: 孫子與有力焉.[65] The fact may or may not be significant; but it is nowhere explicitly stated in the _Shih Chi_ either that Sun Tzŭ was general on the occasion of the taking of Ying, or that he even went there at all. Moreover, as we know that Wu Yüan and Po P‘ei both took part in the expedition, and also that its success was largely due to the dash and enterprise of 夫槩 Fu Kai, Ho Lu’s younger brother, it is not easy to see how yet another general could have played a very prominent part in the same campaign. 陳振孫 Ch‘ên Chên-sun of the Sung dynasty has the note:[66]— Military writers look upon Sun Wu as the father of their art. But the fact that he does not appear in the _Tso Chuan_, although he is said to have served under Ho Lü King of Wu, makes it uncertain what period he really belonged to.[67] He also says:— The works of Sun Wu and Wu Ch‘i may be of genuine antiquity.[68] It is noticeable that both Yeh Shui-hsin and Ch‘ên Chên-sun, while rejecting the personality of Sun Wu as he figures in Ssŭ-ma Ch‘ien’s history, are inclined to accept the date traditionally assigned to the work which passes under his name. The author of the _Hsü Lu_ fails to appreciate this distinction, and consequently his bitter attack on Ch‘ên Chên-sun really misses its mark. He makes one or two points, however, which certainly tell in favour of the high antiquity of our “13 chapters.” “Sun Tzŭ,” he says, “must have lived in the age of Ching Wang [519–476], because he is frequently plagiarised in subsequent works of the Chou, Ch‘in and Han dynasties.”[69] The two most shameless offenders in this respect are Wu Ch‘i and Huai-nan Tzŭ, both of them important historical personages in their day. The former lived only a century after the alleged date of Sun Tzŭ, and his death is known to have taken place in 381 B.C. It was to him, according to Liu Hsiang, that 曾申 Tsêng Shên delivered the _Tso Chuan_, which had been entrusted to him by its author.[70] Now the fact that quotations from the _Art of War_, acknowledged or otherwise, are to be found in so many authors of different epochs, establishes a very strong probability that there was some common source anterior to them all,—in other words, that Sun Tzŭ’s treatise was already in existence towards the end of the 5th century B.C. Further proof of Sun Tzŭ’s antiquity is furnished by the archaic or wholly obsolete meanings attaching to a number of the words he uses. A list of these, which might perhaps be extended, is given in the _Hsü Lu_; and though some of the interpretations are doubtful, the main argument is hardly affected thereby.[71] Again, it must not be forgotten that Yeh Shui-hsin, a