ready to start, the tide had fallen so low that the boat was high and dry; and in spite of all their efforts they could not launch her while she was loaded.
"We'll have to take all the things out of her," said Harry.
"It reminds me," remarked Joe, "of Robinson Crusoe that time he built his big canoe, and then couldn't launch it."
"Robinson wasn't very sharp," said Jim. "Why didn't he make a set of rollers, and put them on the boat?"
"Much good rollers would have been," replied Joe. "Wasn't there a hill between the boat and the water? He couldn't roll a heavy boat uphill, could he?"
"He could have made a couple of pulleys, and rigged a rope through them, and then made a windlass, and put the rope round it," argued Jim.
"Yes; and he could have built a steam-engine and a railroad, and dragged the boat down to the shore that way, just about as easy."
