The keen eyes of the spy were watchful.
Von Salzinger produced a document from his breast pocket. He opened it. He glanced over it, and passed it across to the other.
"My credentials," he said, with triumph in his accompanying glance.
Johann Stryj took the document and perused it carefully. He closely examined the signatures. When he looked up it was obvious that he was almost startled.
"It has never been done before," he said, almost incredulously. "By this the entire Secret Service is placed at your disposal—absolutely."
Von Salzinger nodded.
"Now do you understand? Now?" he cried violently. "We believe this Englishman has burrowed out the most stupendous secret of our Government. We believe he has tricked us through this traitor, Hertzwohl. Gott! He has caused me to be—degraded."
Stryj passed the violence of his companion by. His mind was searching, searching where the less acute soldier could not follow.
"And what of this Hertzwohl? Has he been shot?"
"Not yet. We have to prove this thing—first. That is our work."