"Look out for him," he warned. "He's dangerous."
Ashton-Kirk yawned. "The bird or beast of prey is marked by nature," he said. "And there is no movement they make that is not in itself a warning."
There was nothing more said for some little time. The secret agent read his mail, and indicated upon each letter back what his answer was to be. These he passed to Fuller, who read them over and arranged them for answering. But after finishing this work the young man did not retire at once, as was his custom. He hesitated for a few moments, and then said:
"Don't think I'm taken with the idea that I can run this case better than you; but last night after I left here, I got to going over the matter, and there are some things about it that troubled me."
Ashton Kirk nodded.
"You are not exactly alone in that," he answered. "Several times I have seen what I fancied must be the bottom of the affair; but in almost the next breath, something happened which changed my mind. This morning I was ready to indicate to Osborne what steps to take to secure the assassin of Dr. Morse; but again I received information that brought me to a standstill."
"You found that you were mistaken as to the guilty person?" asked Fuller curiously.
But the other did not reply to this.