“A patrol boat!” shouted Gor Hajus in my ear. Hovan Du growled savagely and shook the chain upon his collar. We raced on, trusting to the big gods and the little gods and all our ancestors that the relentless eye of light would not find us out; but it did. Within a few seconds it fell full upon our deck from above and in front of us and there it clung as the patrol boat dropped rapidly towards us while it maintained a high rate of speed upon a course otherwise identical with ours. Then, to our consternation, the ship opened fire on us with explosive bullets. These projectiles contain a high explosive that is detonated by light rays when the opaque covering of the projectile is broken by impact with the target. It is therefore not at all necessary to make a direct hit for a shot to be effective. If the projectile strikes the ground or the deck of a vessel or any solid substance near its target, it does considerably more damage when fired at a group of men than if it strikes but one of them, since it will then explode if its outer shell is broken and kill or wound several; while if it enters the body of an individual the light rays cannot reach it and it accomplishes no more than a non-explosive bullet. Moonlight is not powerful enough to detonate this explosive and so projectiles fired at night, unless touched by the powerful rays of searchlights, detonate at sunrise the following morning, making a battlefield a most unsafe place at that time even though the contending forces are no longer there. Similarly they make the removal of the unexploded projectiles from the bodies of the wounded a most ticklish operation which may well result in the instant death of both the patient and the surgeon. Dar Tarus, at the controls, turned the nose of our flier upward directly towards the patrol boat and at the same time shouted to us to concentrate our fire upon her propellers. For myself, I could see little but the blinding eye of the searchlight, and at that I fired with the strange weapon to which I had received my first introduction but a few hours since when it was presented to me by Mu Tel. To me that all searching eye represented the greatest menace that confronted us, and could we blind it the patrol boat would have no great advantage over us. So I kept my rifle straight upon it, my finger on the button that controlled the fire, and prayed for a hit. Gor Hajus knelt at my side, his weapon spitting bullets at the patrol boat. Dar Tarus’ hands were busy with the controls and Hovan Du squatted in the bow and growled.