Again Roger nodded. Grover frowned.
“How?”
“I was helping Astrovox carry away packing papers; and he mentioned that Mars, the planet, ruled fire. That word, and the crackle of the paper bunched up in our arms, would make that sound.”
“Was there an open microphone near you?”
Then Roger started.
“No.”
“Then—how?——”
“If we could go to the lab.” Roger had an inspiration, “I could show you.”
It would keep till morning, Grover decided; and dismissing Millman with a warning that his actions were at least not beyond suspicion, Grover set the cable-switch on, and prepared to sleep with Roger.
During the balance of the night their rest was undisturbed.