As the hissing reptile bore down upon the stranger swimming in the open water near the center of the morass on the frontier of Pal-ul-don it seemed to the man that this indeed must be the futile termination of an arduous and danger-filled journey. It seemed, too, equally futile to pit his puny knife against this frightful creature. Had he been attacked on land it is possible that he might as a last resort have used his Enfield, though he had come thus far through all these weary, danger-ridden mi............