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150 business were greater than he had imagined.

Tom hoped to get a quick trip to the Congo, but, as they were sailing over the big desert, there was an accident to the main motor, and the airship suddenly began shooting toward the sands. She was easily brought up, by means of the gas bags, and allowed to settle gently to the ground, in the vicinity of a large oasis. But, when Tom looked at the broken machinery, he said:

"This means a week's delay. It will take that, and longer, to fix it so we can go on."

"Too bad!" exclaimed Mr. Nestor. "The war may be over when we get there. But it can't be helped."

It took Tom and his friends even longer than he had thought to make the repairs. In the meanwhile they camped in the desert place, which was far from being unpleasant. Occasionally a caravan halted there, but, for the most part, they were alone.

"No danger of Eckert, or any of his spies coming here, I guess," said Tom grimly as he blew on a portable forge, to weld two pieces of iron together.

In due time they were again on the wing, and without further incident they were soon in the vicinity of Stanley Falls. They managed to locate