pocket, and the giant fountain pen.
Grasping the tip of his cane he gave a sharp tug and an inner lining
slid outward. From this he drew out a third length, and from that a
fourth. His metal cane was in reality an extension rod, not unlike a
telescoping fishing-rod. It was fully ten feet long. In its curved
handle was a small opening, like a keyhole. Into this Henry jammed the
bayonet connection that terminated one of the wires. The other end of
the wire he thrust into a like opening in the side of his big fountain
pen. Into the opposite side of his pen he fastened one end of his
second wire, attaching the other end of this wire to his knife, which
he thrust deep into the earth. Then, raising the extended cane aloft
with his left hand, he put the point of his fountain pen to his right
ear and listened. The mysterious articles that the secret service had
supplied constituted a complete wireless receiving set. He could catch
any message sent from a point within six or eight miles.

He was not a moment too soon. Hardly had he gotten the fountain pen
adjusted before there came a crackling in his ear. He rested his cane,
upright, against the stump, and began to tune his instrument by sliding
the cap of the fountain pen in and out. In a second he had tuned it
perfectly. The sounds came to him with startling clearness.

"He's near at hand," muttered Henry.

He seized his pencil and wrote down on his map the letters that were
sounding in his ear. Then with frantic haste he disconnected his
instrument, telescoped his extension cane, and gathered up the
different articles and thrust them into his pockets. As rapidly as he
could pick his way, he went back to his hidden machine. He fastened
the metal cane in place, and got everything ready for a quick start.

Suddenly a faint purring noise came to his ears. "Ah!" muttered Henry,
"he's started his motor. He's off in that direction. What shall I do?"

His first impulse was to run at speed toward the purring motor, and to
try to locate exactly the position of the hidden wireless station. But
discretion showed him that was not wise. The spy might turn his lights
on at any moment and Henry would be caught. Then everything was lost.

"I must make sure I can find the place in the daytime," muttered Henry.
Carefully he gauged the sound, deciding whence it came. "He's right
off there," he said. And with his heel he made a long mark in the
turf, pointing straigh