"Sam," said Sally, "I don't know what you think, but I call it good sand."
"So do I," said I, "but foolish."
"Why foolish?" said Sally. "They're really going quite fast, and they'll be across in no time, and they'll get the next train and everything."
"They will not," I said.
"Why?" said Sally.
"Because," said I, "they will run on to the middle ground, and stay there."
"Not at high tide!" exclaimed Sally.
"At high tide," said I. "That float draws a good two feet, and it's so heavy that once it runs on the mud it will stay on the mud—" And then I shouted to Billoo:
"Look out for the middle ground!"
"What?" he answered.