ve anything you see in any window, leaves one
just as rich, but unsatisfied. So the advice of the war correspondent
to seek out German spies came to Jimmie like a day at the circus, like a
week at the Danbury Fair. It not only was a call to arms, to protect his
flag and home, but a chance to play in earnest the game in which he
most delighted. No longer need he pretend. No longer need he waste his
energies in watching, unobserved, a greedy rabbit rob a carrot field.
The game now was his fellow-man and his enemy; not only his enemy, but
the enemy of his country.

In his first effort Jimmie was not entirely successful. The man looked
the part perfectly; he wore an auburn beard, disguising spectacles, and
he carried a suspicious knapsack. But he turned out to be a professor
from the Museum of Natural History, who wanted to dig for Indian
arrow-heads. And when Jimmie threatened to arrest him, the indignant
gentleman arrested Jimmie. Jimmie escaped only by leading the professor
to a secret cave of his own, though on some one else's property, where
one not only could dig for arrow-heads, but find them. The professor
was delighted, but for Jimmie it was a great disappointment. The week
following Jimmie was again disappointed.

On the bank of the Kensico Reservoir, he came upon a man who was acting
in a mysterious and suspicious manner. He was making notes in a book,
and his runabout which he had concealed in a wood road was stuffed with
blue-prints. It did not take Jimmie long to guess his purpose. He was
planning to blow up the Kensico dam, and cut off the water supply of
New York City. Seven millions of people without water! With out firing
a shot, New York must surrender! At the thought Jimmie shuddered, and
at the risk of his life by clinging to the tail of a motor truck, he
followed the runabout into White Plains. But there it developed the
mysterious stranger, so far from wishing to destroy the Kensico dam,
was the State Engineer who had built it, and, also, a large part of the
Panama Canal. Nor in his third effort was Jimmie more successful. From
the heights of Pound Ridge he discovered on a hilltop below him a man
working alone upon a basin of concrete. The man was a German-American,
and already on Jimmie's list of "suspects." That for the use of the
German artillery he was preparing a concrete bed for a siege gun was
only too evident. But closer investigation proved that the concrete was
only two inches thick. And th