u says in the T`UNG TIEN: "To drop fire into the
enemy's camp. The method by which this may be done is to set the
tips of arrows alight by dipping them into a brazier, and then
shoot them from powerful crossbows into the enemy's lines."]

2. In order to carry out an attack, we must have means
available.

[T`sao Kung thinks that "traitors in the enemy's camp" are
referred to. But Ch`en Hao is more likely to be right in saying:
"We must have favorable circumstances in general, not merely
traitors to help us." Chia Lin says: "We must avail ourselves
of wind and dry weather."]

the material for raising fire should always be kept in readiness.

[Tu Mu suggests as material for making fire: "dry vegetable
matter, reeds, brushwood, straw, grease, oil, etc." Here we have
the material cause. Chang Yu says: "vessels for hoarding fire,
stuff for lighting fires."]

3. There is a proper season for making attacks with fire,
and special days for starting a conflagration.
4. The proper season is when the weather is very dry; the
special days are those when the moon is in the constellations of
the Sieve, the Wall, the Wing or the Cross-bar;

[These are, respectively, the 7th, 14th, 27th, and 28th of
the Twenty-eight Stellar Mansions, corresponding roughly to
Sagittarius, Pegasus, Crater and Corvus.]

for these four are all days of rising wind.
5. In attacking with fire, one should be prepared to meet
five possible developments:
6. (1) When fire breaks out inside to enemy's camp, respond
at once with an attack from without.
7. (2) If there is an outbreak of fire, but the enemy's
soldiers remain quiet, bide your time and do not attack.

[The prime object of attacking with fire is to throw the
enemy into confusion. If this effect is not produced, it means
that the enemy is ready to receive us. Hence the necessity for
caution.]

8. (3) When the force of the flames has reached its height,
follow it up with an attack, if that is practicable; if not, stay
where you are.

[Ts`ao Kung says: "If you see a possible way, advance; but
if you find the difficulties too great, retire."]

9. (4) If it is possible to make an assault with fire from
without, do not wait for it to break out within, but deliver your
attack at a favorable moment.

[Tu Mu says that the previous paragraphs had reference to
the fire breaking out (either accidentally