Page:Sun Tzu on The art of war.djvu/145

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22. The rising of birds in their flight is the sign of an ambuscade.

Startled beasts indicate that a sudden attack is coming.

23. When there is dust rising in a high column, it is the sign of chariots advancing; when the dust is low, but spread over a wide area, it betokens the approach of infantry.

When it branches out in different directions, it shows that parties have been sent to collect firewood.