aw a shadow against the light, looked up intently, and saw
that it was Jack Young. Jack pointed. Dick, not quite understanding, moved
to the spot at which he pointed.

"Stay there!" said Jack, soundlessly. His lips formed the words but he did
not utter them. He nodded up and down vehemently, however, and Dick
understood him, and that he was to stay where he was. He nodded in return,
and settled down in his new position. And then Jack dropped out of sight.

For a long time, while the dawn waxed and the light through the window grew
stronger, Dick sat there wondering. Only the breathing of the three men
disturbed the quiet of the little hut. But then, from behind him, he grew
conscious of a faint noise. Not quite a noise, either; it was more a
vibration. He felt the earthen floor of the hut trembling beneath him. And
then at last he understood.

He had nearly an hour still to wait. But at last the earth cracked and
yawned where he had been sitting. He heard a faint whisper.

"Dig it out a little--there's a big hole underneath. You can squirm your
way through. I'm going to back out now."

Dick obeyed, and a moment later he was working his way down, head first,
through the tunnel Jack had dug from the outside. He was small and slight
and he got through, somehow, though he was short of breath and dirtier than
he had ever been in his life when at last he was able to straighten
up--free.

"Come on!" cried Jack. "We've no time to lose. I've got a couple of
bicycles here. We'd better run for it."

Run for it they did, but there was no alarm. Behind them was the hut, quiet
and peaceful. And beyond the hut was the menace of Bray Park and the
mysteries of which the Germans had spoken in the great grey motor car.

CHAPTER XV

A DARING RUSE

Harry, furious as he was when he saw Graves allowed to go off after the
false accusation that had caused his arrest, was still able to control
himself sufficiently to think. He was beginning to see the whole plot now,
or to think he saw it. He remembered things that had seemed trivial at the
time of their occurrence, but that loomed up importantly now. And one of
the first things he realized was that he was probably in no great danger,
that the charge against him had not been made with the serious idea of
securing his conviction, but simply to cause his detention for a little
while, and to discredit any information he might have.

He could no longer doubt that Graves was in le