He started to pace up and down the narrow floor space of the tiny room, his hands opening and shutting and a light of enthusiasm dancing in his eyes. It was not the money face he wore as he spoke but the expression of the man of deeds, the man who joyed in accomplishment, in vanquishing difficulty, in facing long odds, buoyed up and carried along by the will to win. "You can't understand, my dear, all this means to me and will mean to you. I haven't even imagined it myself. Think! We could buy islands, build hospitals, govern nations if the mood prompted us. And all for three weeks' work. Lord, it's--Oh! if I could make you see how big it is--how magnificent." And womanlike she responded, "I want you, Tony, the rest only frightens me." "Forget the money," he said, "and bear this in mind. If I succeed the world will be richer by a tremendous healing force." "A medicine?" "Call it a medicine. It's lying out in the open within a little march of the common ways of men and women. I tumbled on the find by a stroke of luck and a little knowledge and a word inside me that whispered, 'Look, go and look.' You've read Kipling's 'Explorer'--I read it you. 'Something lost behind the ranges--something hidden, go you there.' It was like that with me--a pringly feeling--a kind of second sense--expectancy--belief--certainty. Nature has a trick of showing the combination of her treasure safe to one man before the rest--and I was the man." The little chestnut head shook helplessly from side to side. "What is it you've found?" said Isabel. He looked at her searchingly and hesitated. "If I tell you you'll keep it secret?" "Yes." "Honest?" "Honest." He dropped his voice. "It's radium," he said. She repeated the word dully. "Radium as it never had been found before. A--whew! an inexhaustible supply. Look--look here!" He drew from his pocket a small black cylinder with a glass peephole at the top, protected by a circular cap of a dark substance. "It's the finest piece of radium ever found," he said, "and where I got it, at a single dip of the shovel--but never mind that. See, protect it with your hand so, and look through that eyehole." At the bottom of the cylinder was a luminous speck like a fire seen from a long way off. Waves and jags of angry light burst from it ceaselessly, this way and that. The restless mass was alive, active, burning. Infinitesimal though its dimensions were it gave a sense of illimitable force and power, a prodigious energy. Isabel returned the cylinder with a nervous shudder. "I don't like it," she said. "It--it's horrid somehow--wicked looking." She shot a quick glance at him. "You say this is going to be of value to the world!" He nodded. "Then why are you in danger? Why aren't you protected as someone who-- Why are you in danger?" He didn't answer at once and again she repeated the question.