As we continued along our way across the level stretch of gravel we sought to solve the mystery of these abandoned weapons, a mystery that was still further heightened by our discovery of many more. In some cases the harness had rotted away entirely, leaving nothing but the metal parts, while in others it was comparatively sound and new. Presently we discerned a white mound ahead of us, but in the dim light of the cavern we could not at first determine of what it consisted. When we did, we were filled with horror, for the white mound was of the bones and skulls of human beings. Then, at last, I thought I had an explanation of the abandoned harness and weapons. This was the lair of the great lizard. Here he took his toll of the unhappy creatures that passed down the river, but how was it that armed men had come here. We had been cast into the cavern unarmed, as I was positive all of the condemned prisoners of Tjanath must have been. From whence came the others? I do not know, doubtless I shall never know. It was a mystery from the first. It will remain a mystery to the last. As we passed on we found harness and weapons scattered all about, but there was infinitely more harness than weapons. I had added a good short sword to my equipment, as well as a dagger, as had also Nur An, and I was stooping to examine another weapon which we had found--a short sword with a beautifully ornamented hilt and guard--when Nur An suddenly voiced an exclamation of warning. "On guard," he cried, "Hadron! It comes!" Leaping to my feet, I wheeled about, the short sword still in my hand, and there, bearing down upon us at considerable speed and with wide distended jaws, came the great white lizard hissing ominously. He was a hideous sight, a sight such as to make even a brave man turn and run, which I am now convinced is what practically all of his victims did; but here were two who did not run. Perhaps he was so close that we realized the futility of flight without giving the matter conscious thought, but be that as it may, we stood there--Nur An with his long sword in his hand, I with the ornately carved short sword that I had been examining, though instantly I realized that it was not the weapon with which to defend myself against this great hulking brute. Yet I could not bear to waste a weapon already in my hand, especially in view of an accomplishment of mine in which I took considerable pride. In Helium, both officers and men often wager large amounts upon the accuracy with which they can hurl daggers and short swords and I have seen considerable sums change hands within an hour, but so proficient was I that I had added considerably to my pay through my winning until my fame had spread to such an extent that I could find no one willing to pit his skill against mine.