"What's the matter?" cried Professor Henderson, running in from the pilot-house, for an automatic signal there had apprised him that something was wrong.

"There's a bad break," said Jack ruefully.

"A bad break! I should say there was," remarked the scientist. "I think we'll have to lay up for repairs." And he called Mr. Roumann.

CHAPTER XXIII

LOST ON THE MOON

Notwithstanding that they were somewhat accustomed to having accidents happen, it was not with the most pleasant feelings in the world that the moon travellers contemplated this one. It meant a delay, and a delay was the one thing they did not want just now.

They desired to get to the other side of the moon while the long period of sunshine gave them an opportunity for observation. True there was some time yet ere the long night of fourteen days would settle down, but they felt that they would need every hour of sunshine.

"Well, it's tough luck, but it can't be helped," said Mark.

"No, let's get right to work," suggested Jack.

They got out their tools and started to repair the two pumps. It was found that the Cardite motor was not badly damaged, one of the negative electrical plates merely having been smashed by a piece of the broken connecting rod of the air pump. It was only a short time before the motor was ready to run again.