Typhoons are a sort of violent whirlwinds. Before these whirlwinds come on... there appears a heavy cloud to the northeast which is very black near the horizon, but toward the upper part is a dull reddish color. The tempest came with great violence, but after a while, the winds ceased all at once and a calm succeeded. This lasted... an hour, more or less, then the gales were turned around, blowing with great fury from the southwest.