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 do you imagine they would take hold of so liquid a thing as water?" "What would you suggest?" "I would suggest that your water waggon be jointed in half-a-dozen places, so that it could be made to squirm through the water like a fish. Listen! A fish navigates the water. You desire to navigate the water. Then study the fish! There are fish that use propeller fins and flippers too. So you might devise broad boards to strike the water, as our hands and feet strike it in swimming. But do not talk about waggon wheels in the water!" They were now beside the broad river. The first steamer to navigate it was seen approaching from the distance. The boys could not yet well distinguish it. "It is evidently a whale," said Pedro. "What navigates the water? Fish. What is the fish that sometimes is seen swimming with its body half way above the surface? The whale. See, it is spouting water!" "That is not water, but steam or smoke," said Luis. "Then it is a dead whale, and the steam is the vapour of putrefaction. That is why it stays