The sloping wall of the pit was not difficult for an active man to climb, but I hesitated long before I trusted myself within reach of the dreadful creature which had so nearly destroyed me. How did I know that he was not lurking in the nearest clump of bushes, waiting for my reappearance? I took heart, however, as I recalled a conversation between Challenger and Summerlee upon the habits of the great saurians. Both were agreed that the monsters were practically brainless, that there was no room for reason in their tiny cranial cavities, and that if they have disappeared from the rest of the world it was assuredly on account of their own stupidity, which made it impossible for them to adapt themselves to changing conditions.