"A submarine! A submarine!" he shouted at the top of his voice. "Come ahead, Slady!"
The regular operator did not seem in the least concerned, but Tom, roused out of his usual calm, followed Archer up the steps and to the rope railing where several of the ship's boys were congregated.
"Let him see," commanded Archer.
Tommy Walters handed the marine glass to Tom. "Over there to the west," he said.
"It's just a periscope," said Archer. "See? See it sticking up?"
Looking far out over the water, Tom could see through the long glass a dark, thin upright object which seemed to move as he looked at it.
"O-o-oh, ye-e-es!" he exclaimed, gazing intently. "It's a periscope, sure!"
"Look over there to the west!" shouted Archer suddenly. "Is that another one?"
Tom turned the glass to the westward, and sure enough, there was another one.
"We're surrounded! There's a whole fleet of 'em! Oh, joy!" exclaimed Archer. "Look there to the south!"