get back from the moon. I'm for giving him a chase and having him
arrested."

"He certainly deserves some punishment, if only for the way he treated
Mark," was Jack's opinion, his chum having related how he was drugged
and kept a prisoner in the secret room, and how he escaped in time to
unmask the villain.

"Well," said Professor Henderson, after some thought, "it might not be
a bad plan to see if you could get that scoundrel put in some safe
place, where he could make no more trouble for us. I guess the lunatic
asylum is where he belongs, though I can sympathize with him on account
of his brother. But it was not our fault that the crazy machinist went
with us to Mars. He was a stowaway, and went against our wishes, and
when he got there he tried to injure us."

"Then may Mark, Andy and I see if we can find this man?" asked Jack.

"Yes, but be careful not to get separated; and don't run any risks,"
cautioned the professor. "Mr. Roumann and I, with the help of
Washington, will go carefully over all the machinery, and every part of
the projectile, to see if any hidden damage has been done. But don't
stay out too late. You had better notify the police. They may be able
to give you some aid, and I don't mind letting them know about it now,
as we will soon be away from here, because, no matter if they do send
detectives or constables spying about now, they can learn none of our
secrets."

Waiting only to partake of a hasty meal, the two boys and the veteran
hunter set out, Andy with his gun over his shoulder and his sharp eyes