He realized that he occupied a very remarkable position in the march of ages. He had known and seen and benefited by all the accumulated knowledge of ages of progression from the stone age to the twentieth century, and now, suddenly, fate had snatched him back into the stone age, or possibly a few eons farther back, only to show him that all that he had from a knowledge of other men's knowledge was keen dissatisfaction with the stone age. He had lived in houses of wood and brick and looked through windows of glass. He had read in the light of gas and electricity, and he even knew of candles; but he could not fashion the tools to build a house, he could not have made a brick to have saved his life, glass had suddenly become one of the wonders of the world to him, and as for gas and electricity and candles they had become one with the mystery of the Sphinx. He could write verse in excellent Greek, but he was no longer proud of that fact. He would much rather that he had been able to tan a hide, or make fire without matches. Waldo Emerson Smith-Jones had a year ago been exceedingly proud of his intellect and his learning, but for a year his ego had been shrinking until now he felt himself the most pitiful ignoramus on earth. "Criminally ignorant," he said to Nadara, "for I have thrown away the opportunities of a lifetime devoted to the accumulation of useless erudition when I might have been profiting by the practical knowledge which has dragged the world from the black bit of barbarism to the light of modern achievement--I might not only have done this but, myself, added something to the glory and welfare of mankind. I am no good, Nadara--worse than useless." The girl touched his strong brown hand caressingly, looking proudly into his eyes. "To me you are very wonderful, Thandar," she said. "With your own hands you slew Nagoola, the most terrible beast in the world, and Korth, and Flatfoot, and Big Fist lie dead beneath the vultures because of your might--single-handed you killed them all; three awesome men. No, my Thandar is greater than all other men." Nor could Waldo Emerson repress the swelling tide of pride that surged through him as the girl he loved recounted his exploits. No longer did he think of his achievements as "vulgar physical prowess." The old Waldo Emerson, whose temperature had risen regularly at three o'clock each afternoon, whose pitifully skinny body had been racked by coughing continually, whose eyes had been terror filled by day and by night at the rustling of dry leaves, was dead. In his place stood a great, full blooded man, brown skinned and steel thewed; fearless, self-reliant, almost brutal in his pride of power--Thandar, the cave man. The months that passed as Thandar led his people from one honeycombed cliff to another as he sought a fitting place for a permanent village were filled with happiness for Nadara and the king.