Fancy apart, San Francisco is a city beleaguered with alarms. The lower parts, along the bay side, sit on piles; old wrecks decaying, fish dwelling unsunned, beneath the populous houses; and a trifling subsidence might drown the business quarters in an hour. Earthquakes are not only common, they are sometimes threatening in their violence; the fear of them grows yearly on a resident; he begins with indifference, ends in sheer panic; and no one feels safe in any but a wooden house. Hence it comes that, in that rainless clime, the whole city is built of timber⁠—a woodyard of unusual extent and complication; that fires spring up readily, and served by the unwearying trade-wind, swiftly spread; that all over the city there are fire-signal boxes; that the sound of the bell, telling the number of the threatened ward, is soon familiar to the ear; and that nowhere else in the world is the art of the fireman carried to so nice a point.