And then there was a sudden rending, blinding, terrifying crash that sent the world into a thousand shrieking echoes. A huge shell had fallen not fifty feet away, plowing its way through the earthworks above. Its explosion sent timbers, abandoned gun-carriages, everything, flying through the air. And one great piece of wood caught Patsy a glancing blow on the back of her head as she crouched over the wounded Belgian. With a weak cry she toppled over, not unconscious, but unable to raise herself.