By this time, Bill’s lungs were nearly bursting and his head throbbed with the strain of remaining under water. Feeling that he must have air or drown, he turned on his back and rose, careful that no more than his nose and mouth appeared above the surface. Two or three life-giving breaths, and he sank again, with the muffled sound of revolver shots in his ears. After another spurt under water in the direction indicated by Osceola, he came up to the surface again, sinking as soon as he had filled his lungs with air.