He was puzzled, for, save a few luggers swinging from the little buoys that dotted the surface of the sea, there was not a sign of an accident by the upsetting of a boat, or of any one struggling in the water. Everything looked bright and cheerful in the morning sun, and after sculling along for some time he was beginning to think that the cry must have been uttered by some sea-bird, seeming weird and strange in the early morning, when he suddenly recalled the fact that sound travels far over a smooth, calm sea.