The nucleus of this work is probably genuine, though large additions have
been made by later hands. Kuan chung died in 645 B.C.
See infra, beginning of INTRODUCTION.
I do not know what this work, unless it be the last chapter of another
work. Why that chapter should be singled out, however, is not clear.
About 480 B.C.
That is, I suppose, the age of Wu Wang and Chou Kung.
In the 3rd century B.C.
Ssu-ma Jang-chu, whose family name was T’ien, lived in the latter half of the 6th century B.C., and is also believed to have written a work on war. See Shih Chi, ch. 64, and infra