These six are the principles connected with Earth.
Or perhaps, “the principles relating to ground.” See, however, I.
§ 8.
The general who has attained a responsible post must be careful to
study them.
Capt. Calthrop omits 至任. Out of the foregoing six 地形, it will
be noticed that nos. 3 and 6 have really no reference to the
configuration of the country, and that only 4 and 5 can be said to
convey any definite geographical idea.