I had started across the valley toward the cliffs, hoping I might find a cave there, for the nip of the air warned me that the night would not be as warm as the day, when a hellish clamor up near the mouth of the valley caused me to wheel and glare in that direction. Over the ridge came what I thought to be a pack of hyenas, except for their noise, which was more infernal than an earthly hyena, even, could produce. I had no illusions as to their purpose. It was I they were after.

Necessity recognizes few limitations. An instant before I had been limping painfully and slowly. Now I set out on a mad race for the cliff as if I were fresh and unwounded. With every step a spasm of agony shot along my thigh, and the wound, bleeding afresh, spurted red, but I gritted my teeth and increased my efforts.

My pursuers gave tongue and raced after me with such appalling speed that I had almost given up hope of reaching the trees beneath the cliffs before they pulled me down. They were snapping at my heels when I lurched into the low stunted growths, and swarmed up the spreading branches with a gasp of relief. But to my horror the hyenas climbed after me! A desperate downward glance showed me that they were not true hyenas; they differed from the breed I had known just as everything on differed subtly from its nearest counterpart on Earth. These beasts had curving catlike claws, and their bodily structure was catlike enough to allow them to climb as well as a lynx.

Despairingly, I was about to turn at bay, when I saw a ledge on the cliff above my head. There the cliff was deeply weathered, and the branches pressed against it. A desperate scramble up the perilous slant, and I had dragged my scratched and bruised body up on the ledge and lay glaring down at my pursuers, who loaded the topmost branches and howled up at me like lost souls. Evidently their climbing ability did not include cliffs, because after one attempt, in which one sprang up toward the ledge, clawed frantically for an instant on the sloping stone wall, and then fell off with an awful shriek, they made no effort to reach me.