"Impossible," was the short answer. "He deserves all and more than we possess, that I acknowledge freely. But I cannot disclose its whereabouts till the disc comes to my hand. Would that I had never made the error of sending it away. But the mistake was made, and nothing but the return of the disc can set the matter right. With that before me I can read the secret, and hand this reward to the cacique. If it does not come, he must fly, rich in the memory of the gallantry he has shown." It was useless to argue further, and the king, who, like his predecessors, was completely in the hands of the priesthood, was compelled to be satisfied with the assurance he had received. If the disc was discovered, then this Roger de Luce, for whom he had conceived a great affection, would receive reward, would have his pick of gold and gems which, to a Mexican, were of little or no value, but which to these white men were better than life itself, else why should the Spaniards fight so fiercely for their possession, sacrificing thereby so many thousands of innocent people, and bringing misery into so many homes? But it was no time for soliloquizing, for down in the streets below the turmoil of the battle rose even louder. Flushed with their success the enemy were pushing forward, and were now within a little way of the rendezvous, where the two forces were to meet. They could hear one another's cannon, and even their comrades' shouts. They were spurred to even greater efforts, and forgetting the caution which their leader had impressed upon them they raced on, forgetful of the chasms left gaping behind, of the thousands of Mexicans concealed beneath the streets and in the side canals, forgetful of all save the mad desire to conquer, to end the siege, to reach this market square, than which there was none so fine in the whole of Spain, or even in Europe, and reach the goal before their comrades. It was a race, and a costly one it proved. "The time has come. The cage door should be shut," said the king of Mexico, solemnly. "There is Roger the cacique. I see him plainly, and he waves to me. I will sound the signal which will set the dogs loose on them, and will drive them from the city." He raised a huge horn to his lips and took in a deep breath. Then he sounded a long, deep, mournful note, which penetrated to every corner. Once more he sent it floating across the city. Then he threw the horn down, and raced to the streets below; for this king was a gallant young fellow, kind and gentle when not roused, but a plucky fighter, possessed of unusual courage.