"I was signaling, but not to the spy," replied the detective.
"To whom, then?"
"To one of my assistants, senator." Nick was now shading his lips with one hand so that what he was saying could not be read.
"Do you mean that one of your assistants is over there, near the spy?" asked the senator.
"Yes."
"I begin to understand you now."
"Surely-"
"You brought him here secretly, I suppose."
"Yes; he and two others. They are all busy, right now, doing part of the work that is required of them."
"It was a happy thought when you did that, Carter. One of your assistants is a Jap, isn't he?"