Any one but the sentry, with half an eye, might have seen that the fear he showed was cleverly feigned.  He threw his hands above his head even before he was ordered and in general was the most tractable captive imaginable.  The sentry blew a whistle, whereat the other sentry ran in.

“What shall we do with him,” asked the captor.

“Master’s orders to take any one to the rendezvous,” responded the other firmly, “and lock him up.”

Together they forced the tramp to march double quick toward the old hotel.  One sentry dropped back at the door and the other drove the tramp before him into the hotel, avoiding the big room on the side where the men were at work and forcing him up-stairs to the attic which had once been the servant’s quarters.

There was no window in the room and it was empty.  The only light came in through a skylight in the roof.

The sentry thrust the tramp into this room and tried a door leading to the next room.  It was locked.  At the point of his gun the sentry frisked the tramp for weapons, but found none.  As he did so the tramp trembled mightily.  But no sooner had the sentry gone than the tramp smiled quietly to himself.  He tried both doors.  They were locked.  Then he looked at the skylight and meditated.

Down below, although he did not know it, in the bare dining-room which had been arranged into a sort of chemical laboratory, Del Mar’s men were engaged in manufacturing gas bombs much like those used in the war in Europe.  Before them was a formidable array of bottles and retorts.  The containers for the bombs were large and very brittle globes of hard rubber.  As the men made the gas and forced it under tremendous pressure into tubes, they protected themselves by wearing goggles for the eyes and large masks of cloth and saturated cotton over their mouths and noses.

Satisfied with the safety of his captive, the sentry made his way down-stairs and out again to report to Del Mar.

At the bungalow, Del Mar’s valet was setting the library in order when he heard a signal in the secret passage.  He pressed the button on the desk and opened the panel.  From it the sentry entered.

“Where is Mr. Del Mar?” he asked hurriedly, looking around.  “We’ve been followed to the headquarters by a tramp whom I’ve captured, and I don’t know what to do with him.”

“He is not here,” answered the valet.  “He has gone to the Country Club.”

“Confound it,” returned the sentry, vexed at the enforced waste of time.  “Do you think you can reach him?”

“If I hurry, I may,” nodded the valet.

“Then do so,” directed the sentry.

He moved back into the panel and disappeared while the valet closed it.  A moment later he, too, picked up his hat and hurried out.

At the Wilkeshire Club a large number of hunters had arrived for the imitation meet.  Elaine, Aunt Josephine, Del Mar and myself rode up and were greeted by them as the Master of Fox Hounds assembled us.  Off a bit, a splendid pack of hounds was held by the huntsman while they debated whether to hold a paper chase or to try a drag hunt.