"I suppose so," assented Blake. "And yet Lieutenant Secor isn't one of
our officers."

"No, but he's been in our camps, and he's been a guest of Uncle Sam.
He's been in a position to spy out some of the army secrets, and now we
see him talking to this German."

"But this man may _not_ be a subject of the Kaiser," said Blake.

"Sure he is!" declared Charlie. "He's no more a real Jew than I am! He's
a Teuton! Germany has no love for the Jews, and they don't have any use
for the Huns. Take my word for it, fellows, there's something wrong
going on here."

"It may be," admitted Blake; "but does it concern us?"

"Of course it does!" declared Joe. "This Frenchman may be betraying some
of Uncle Sam's secrets to the enemy--not only our enemy, but the enemy
of his own country."

"Yes, I suppose there are traitorous Frenchmen," said Blake slowly, "but
they are mighty few."

"But this means something!" declared Macaroni.

And Blake, slow as he was sometimes in forming an opinion, could not but
agree with him.

In silence the boys watched the two men at their queer conference. The