"Who is Murdock?"
"I don't know, unless he is another member of the gang or unless that is an assumed name."
"It may be that. What else did you hear?"
"The man we know as Morse replied that he hadn't heard from him, but that he suspected Murdock was playing a double game. Then the tramp—Happy Harry—asked this question: 'Have you any clew to the sparkler?' And Morse answered: 'No, but I think Murdock has hid it somewhere and is trying to get away with it without giving us our share.' Then the two men walked away, and I came back to the hotel," finished Mr. Swift.
"Sparkler," murmured Tom. "I wonder what that can be?"
"That's a slang word for diamonds," suggested Ned.
"So it is. In that case, dad, I think we have nothing to worry about. Those fellows must be going to commit a diamond robbery or perhaps it has already taken place."
The inventor seemed relieved at this theory of his son. His face brightened and he said: "If they are going to commit a robbery, Tom, we ought to notify the police."
"But if they said that 'Murdock,' whoever he is, had the sparkler and was trying to get away with it without giving them their share, wouldn't that indicate that the robbery had already taken place?" asked Ned.
"That's so," agreed Tom. "But it won't do any harm to tell the hotel detective that suspicious characters are around, no matter if the robbery has been committed. Then he can be on the lookout. But I don't think we have anything to worry about, dad. Still, if you like, I'll take a run down to the house to see that everything is all right, though I'm sure it will be found that we have nothing to be alarmed over."