“I don’t believe it, Thrush.”

“No more do I, father, for a single instant. Tony, of all people!”

Thrush looked from one to the other with a somewhat disingenuous eye. “I don’t say I altogether accept it myself; that’s why I kept it to the end,” he explained. “But we must balance the possibilities against the improbabilities, never losing sight of the one incontestable fact that the boy has undoubtedly disappeared. And here’s a man, a well-known man, who makes no secret of the fact that he found him wandering in the Park, in the early morning, breathless and dazed, and drove him home to his own house, where the boy spent the day; they took a hansom, the doctor tells me, than which no statement is more quickly and easily checked. Are we to believe this apparently unimpeachable and disinterested witness, or are we not? He was most explicit about everything, offering to show me exactly where he found the boy, and never the least bit vague or unsatisfactory in any way. If you are prepared to believe him, if only for the sake of argument, you may care to hear Dr. Baumgartner’s theory as to what has happened.”

Lettice shook her head in scorn, but Mr. Upton observed, “Well, we may as well hear what the fellow had to say to you; we must be grateful to him for taking pity on our boy, and he was the last who saw him; he may have seen something that we shouldn’t guess.”

“Exactly!” exclaimed Eugene Thrush; “he saw, or at any rate he now thinks he saw, enough to build up a pretty definite theory on the foundation of fact supplied by me. He didn’t know the boy had come up to see a doctor and been refused a lodging for the night; he understood he had come up to join his ship, and suspected he had been on a sort of mild spree—if Miss Upton will forgive me!” And he turned deferential lenses on the indignant girl.

“I don’t forgive the suggestion,” said she; “but it isn’t yours, Mr. Thrush, so please go on.”

“It’s an idea that Dr. Baumgartner continues to hold in spite of all I was able to tell him, and we mustn’t forget, as Mr. Upton says, that he was the last to see your brother. Briefly, he believes the boy did meet with some misadventure that night in town; that he had been ill-treated or intimidated by some unscrupulous person or persons; perhaps threatened with blackmail; at any rate imbued with the conviction that he is not more sinned against than sinning. That, I think, is only what one expects of these very conscientious characters, particularly in youth; he was taking something or somebody a thousandfold more seriously than a grown man would have done. Afraid to go back to school for fear of expulsion, ashamed to show his face at home! What’s to be done? He thinks of the ship about to sail, the ship he hoped to sail in, and in his desperation he determines to sail in her still—even if he has to stow away!”

“My God!” cried Mr. Upton, “he’s just the one to think of it. His head was full of those trashy adventure stories!”

But Lettice shook hers quietly.

“To think of it, but not to do it,” said she, with a quiet conviction that rather nettled Mr. Thrush.