"It is a bit of work in the nature of secret service, Captain Prescott," he continued, "and it demands a wary eye and a discerning mind."

Prescott shuddered with repulsion. Instinctively he foresaw what was coming, and there was no task which he would not have preferred in its place. And he was expected, too, at such a moment, to look grateful.

"You will recall the episode of the spy and the abstraction of the papers from the President's office," continued the Secretary of War in orotund and complaisant tones. "It may seem to the public that we have dropped this matter, which is just what we wish the public to think, as it may lull the suspicions of the suspected. But we are more resolved than ever to secure the guilty!"

Prescott glanced again at Mr. Sefton, but he still sat in the shadow, and Prescott believed that he had not yet moved either hand or foot in the whole interview.

"To be brief, Captain Prescott," resumed the Secretary of War, "we wish you to take charge of this service which, I repeat, we consider delicate and important."

"Now?" asked Prescott.

"No, not immediately—in two or three days, perhaps; we shall notify you. We are convinced the guilty are yet in Richmond and cannot escape. It is important that we capture them, as we may unearth a nest of conspirators. I trust that you see the necessity of our action."

Prescott bowed, though he was raging inwardly, and it was in his mind to decline abruptly such a service, but second thought told him a refusal might make a bad matter worse. He would have given much, too, to see the face of Mr. Sefton—his fancy painted there a smile of irony.

As the Secretary of War seemed to have said all that he intended, Prescott turned to go, but he added a word of thanks to Mr. Sefton, whose voice he wished to hear. Mr. Sefton merely nodded, and the young Captain, as he went out, hesitated on the doorstep as if he expected to hear sardonic laughter behind him. He heard nothing.

The fierce touch of the winter outside cooled his blood, and as he walked toward his home he tried to think of a way out of the difficulty. He kept repeating to himself the words of the Secretary of War: "In two or three days we shall send for you," and from this constant repetition an idea was born in his head. "Much may be done in two or three days," he said to himself, "and if a man can do it I will!" and he said it with a sense of defiance.