Read it through once

Joan of Arc raised her sword in the air. At the signal, the silence was torn to rags; cannon after cannon vomited flames and smoke and delivered its quaking thunders; and we saw answering tongues of fire dart from the towers and walls of the city, accompanied by answering deep thunders, and in a minute the walls and the towers disappeared, and in their place stood vast banks and pyramids of snowy smoke, motionless in the dead air. The startled girl dropped her watering-pot and clasped her hands together, and at that moment a stone cannon-ball crashed through her fair body.