“You need no excuses, Griggs,” said the doctor, rousing himself from his musing fit. “It was an act of Christian charity, and I am glad that we were able to share it with you.”

“That’s right, and nicely spoken of you, doctor,” said the American; “but I wish we had been able to help the poor fellow sooner. Here, I’m burning to know how he got into such a state. I s’pose he told you?”

“He told me a great deal,” replied the doctor, “but the time was short, his words hurried, and what he said has set me considering as to how much is simple fact and how much the imagination of a diseased brain.”

“Hah!” exclaimed the American. “Then the best way will be for you to tell us too, and then maybe we shall be able to help you sort it out, and untangle the real thread from the touzly yarn.”

“Exactly,” said the doctor. “Well, it seems that he was one of a dozen adventurous prospectors whose brains had been excited by one of the old legends respecting the discovery of gold by the old mission fathers in one of the deserts between here and Arizona. They banked their funds together, purchased necessaries and provisions, and started with a mule team and a large water-barrel furnished with pole and axles so that it should act as its own wheels, revolving and bearing its own weight—a contrivance, the poor fellow said, that answered capitally in the sandy plains, but only proved a hindrance in the rocky ground.”

“Not a bad idea,” said Griggs, “if it had been all plain, for, as I understand, it’s want of water that has upset every expedition out that way.”

“When all was ready they started, well armed, as I understood him, making for the south and west. They had certain plans which they had obtained from explorers, and went out in full hope of discovering not only a new land of gold, but a city said to exist in the middle of one of the deserts, a ruin now, but containing fabulous wealth amassed by the emperor, cacique, or whatever he was called, and fostered by the old mission fathers, who had made the city their home.”

“Hah!” cried Griggs. “This makes one’s mouth water. Go on, doctor.”

The latter looked at him seriously, and then continued—

“All this sounded very clear and reasonable, but after a time there was so much of the marvellous in the poor fellow’s descriptions that I could not help feeling that we were getting into the dreamland of an enthusiast.”