“I wonder if it could have done that,” remarked Thrush, in a tone of serious speculation which he was instantly called upon to explain. “What are you keeping back?” cried Lettice, the first to see that he had been keeping something all this time. “Only something he’d kept back from them,” replied Thrush, with just a little less than his usual aplomb. “It was a surprise he sprang on them after waking; it will probably surprise you still more, Mr. Upton. You may not believe it. I’m not certain that I do myself. In the morning he had spoken of the Australian voyage as though you’d opposed it, but withdrawn your opposition—one moment, if you don’t mind! In the evening he suddenly explained that he was actually sailing in the _Seringapatam_, that his baggage was already on board, and he must get aboard himself that night!” “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.”