"Well, what's the best thing to do?" asked Mrs. Noah.

"Count the telegraph poles as we go along," suggested Ham. "I think there are about thirty to a mile, and see how long it takes to pass them."

"That's a good idea," said Mr. Jonah, but when they looked out of the portholes they couldn't find any telegraph poles.

And just then, all of a sudden, a pistol shot rang out clear and loud.

The Arkmobile came to a sudden stop, and a voice outside was heard to exclaim:

"Where's the chauffeur?"

Capt. Noah rushed up on deck, followed by his family, Mr. Jonah and Marjorie.

"What's the matter?" asked Capt. Noah, looking about to find the owner of the voice.

"Oh, that's what they all say!" came the reply. "You know jolly well what's the matter!"

"Who are you, and where are you?" asked Capt. Noah, vainly trying to find this remarkable person, who seemed to be nothing but a voice.