sight. It might be taken for granted that they had simply fallen a little behind, and by putting on a spurt of speed could at any time easily catch up.
At any rate the expedition would not delay, waiting for those who tarried. In an affair of this kind the rule was "every tub on its own bottom," and if accidents occurred the unfortunate plane must drop out, and take its individual chance of getting through in safety.
Jack was wondering just how his chum would act in order to bring about this separation. Hence he was not greatly surprised when Tom called out aloud, so that he could make his voice heard above the incessant whirr of motors added to the buzz of many propellers that filled the air with noise:
"Jack, something seems to be wrong with our engine."
"You don't say!" ejaculated Jack, accompanying the remark with a wide grin; for he suspected that this was only the ruse he had been anticipating.
"I don't seem to be able to get along as smoothly as I did before," continued the pilot.
"Why, it's a fact that we are letting the others outrun us some, Tom. Wouldn't it be just too bad if they went off and left us in the lurch?"
"No joke about it, Jack. Something is really
