Vidac then turned to Ed Bush. "Bush, did you see the cadets last night?"
"Yes, sir," said Bush.
"Where?" demanded Vidac.
"Leaving the swimming pool with the professor."
"With the pro—!" exclaimed Tom.
"Shut up, Corbett!" barked Vidac, and then turned to Astro. "Did you say you went swimming alone?"
"We did!" exclaimed the Venusian. "We left the professor at the office. We did not see him again after that. He did not go swimming with us."
Vidac turned to Winters. "Did you see the cadets last night, Winters?"
"Yes, sir," replied the spaceman. "I had the graveyard watch and I was in the galley having a cup of coffee. I saw the cadets enter the galley just as I was leaving."
"Were they alone?" asked Vidac.