Then a slight sound caught his ears from outside the great building. The soft purr of an approaching Rolls-Royce motor and the sharp blast of a Klaxon horn followed.
"At last!" he cried. "Here they come!"
CHAPTER IV
A MIDNIGHT CONSULTATION
The next moment the door burst open and two men in flying helmets and leathern coats entered the room, and saluted the Colonel. Without any ceremony the latter greeted them warmly, almost joyously, for their cheerful presence gave almost instant relief to his over-burdened mind.
"Good evening, Keane. Good evening, Sharpe," he exclaimed, stepping forward and gripping each of them warmly by the hand.
"Good evening, sir."
"Now, have you discovered anything?" began the chief, without waiting for them to divest themselves of their heavy gear.
Keane looked at the Commissioner for a second or two and then answered:--
"Yes, and no, Colonel."