ave
or not, their submarines will be waiting for them and our destroyers
will always be guarding the transports. But here in New York German
spies are trying to create riots, to blow up buildings, to burn
factories. They destroyed almost a million bushels of wheat in one
fire recently. So you see that the secret service first must watch the
enemies that are trying to destroy our greatest city. Our secret
service isn't one-quarter as large as it should be. That is the fault
of Congress. But meantime it is doing wonderful work, and it is a
great privilege to be able to assist in that work."

"But what have they found out about this job?" demanded Roy.

"You're like a hound on a keen scent, Roy," said their leader.
"Nothing ever takes you away from your objective. Well, this is what
they've found. It seems that they have been keeping a record of the
grocer's telephone messages, as well as those from the 'hawk's nest'
down below. Every time transports sail, some one in Hoboken calls up
this grocer and says, 'I have some sugar on the way. Do you want any?'
And the grocer replies, 'Yes. How many barrels can you let me have?'
And the man in Hoboken gives the number. That number corresponds with
the number of transports about to sail. So you see how the grocer
knows when to send his boy for the wireless messages. But before he
sends him, he always telephones to the 'hawk's nest' and says, 'I have
some sugar coming and can let you have five pounds to-day. Do you want
it?' And the number of pounds he offers is the same as the number of
ships that are to sail. So the spy below us knows what to look for.
And I suppose the man in Hoboken also telephones the automobile driver
when to come for the dollars."

"Who is this man in Hoboken that does the telephoning?" demanded Roy,
when Captain Hardy had done speaking.

"Ah! That they don't know. He has always called up from a different
place and has gotten away before the secret service could spot him.
But the agent assures me that they'll have him soon. He always
telephones from a station close to the piers where the transports load.
The next time he calls for the grocer, the telephone operator is going
to delay him while she notifies a secret service agent posted near by
with a motor-cycle. So they'll spot him and trail him.

"And that reminds me," continued Captain Hardy, after a pause, "that
we're to do a little motor-cycle work ourselves, and that Henry has