The lads did so. General Pershing spoke in a low voice.

"You both undoubtedly know," he said, "that since the American
declaration of war on Germany, the activity of German agents and spies
in the United States has grown to startling dimensions?" The lads
nodded and General Pershing continued: "Very good. Now, I have before
me a cable, in code, from the state department, which advises me that
the department of state must have, at all hazards, a list of the most
important German agents in America. It is essential. Here," the
general pushed a slip of paper in front of the lads, "is the
translation of the code message."

Hal and Chester glanced at the paper. It read:

"German prime minister has lists of agents and spies in United States.
Realize it is not in your province to get list, but would enlist your
aid, because our diplomatic agents have all left Germany. List is
essential to safeguarding coast defenses and munitions plants. Do what
you can."

The message was signed by the secretary of state.

Hal passed the paper back to General Pershing. The latter eyed him
keenly.

"'You realize the dangerous nature of the work?" he questioned.

"Perfectly, sir; also its importance. We shall be glad to undertake
it, sir."