Tom looked, and to his great excitement there was another periscope.

"Now turn the glass upside down," said Archer.

Tom did so, and perceived to his amazement that the periscope stuck out of the sky instead of out of the water.

By this time everybody was laughing, and Tommy Walters leaned against the gun, shaking with glee.

"Now look on the other end of the glass," said Archer, dodging behind a stanchion.

Tom, in bewilderment, obeyed, and pulled out a match-end.

"Tag; you're it," said Archer delightedly; "don't throw it away."

"Why not?" said Tom, laughing sheepishly.

"Because you have to wear it with a ribbon," said the irrepressible Archer, fastening it to Tom's buttonhole with a piece of baby ribbon. "You're easy, Slady!"

"I always was," said Tom.