"Silence!" exclaimed Burkett abruptly.  "I heard a sound.  Yes, yes! See, see!  Heaven be praised; that noble fellow Brand is safe, and we may yet be saved!"  As he spoke, a thin stream of light shot upwards from the dark ocean, and broke into a thousand beautiful coruscations above our heads.  "A rocket! the schooner had some on board for signals," cried Burkett.  "She is under weigh to look for us!"