"Maybe, Don; but I have a theory of my own. If I am right, I can work it better if I tell no one."
At this moment the physician entered the room.
"How is Santiago?" asked Donald.
"Better! He has gone to sleep, and if he is not disturbed, I expect him to be greatly improved when he awakens. I should not be surprised if this were the turning point in his illness."
"Then we had all better go down on to the first floor and leave him alone with his nurses."
"I'd give a good deal to know where Strong is," remarked Donald as they were drinking their coffee an hour later.
"So would I," declared Billie. "I believe, if we can find him, we can solve this entire mystery."
"As soon as we finish our coffee," suggested Donald, "let's get busy and find him. He can't be far."
"That's right," said Adrian. "We'll round him up in short order. Hey, Billie?"
"We ought to; but I'll tell you what. You fellows go out and see if you can get a line on him, and I'll hang round the house to see that the devil doesn't come and steal the rest of the house."