“It is a signal of some kind, but if the island is uninhabited, who could have made it?”
“Why couldn’t the ones who made it come from some other island?” asked Jim.
“And gone back again,” suggested Jo.
“Perhaps so,” replied the professor, “but that doesn’t make it any clearer.”
“You never can see through smoke very well,” suggested Jo.
“True,” laughed the professor, “but still somehow I don’t like it.”
“Then we saw a ship in the distance, apparently headed for this island, but far off the southern shore.”
“Six o’clock,” broke in Tom, as four bells were struck. “I think I will accept the invitation to dine.”
“A good plan,” commended the professor, “and Monday we must get an early start and learn, if we can about that ship you saw, and begin a more thorough exploration.”