"In a powerful motor boat," was the reply.
"Say, this is going to be a regular picnic. I thought you chaps said hard work lay ahead of us," complained Donald.
"Don't worry," laughed Rob; "I guess we'll find lots to do."
"Never fear," struck in the ensign. "Besides the inventor of the Peacemaker, Mr. Danbury Barr, and ourselves, there will be only three trusted sailors, familiar with submarine work, to conduct the tests; so you see that you boys will have your time well occupied."
"Are those tents for us?" asked Paul Perkins interestedly.
"Why, no. You brought your own camping outfits with you. I shall sleep in one, Mr. Barr in another, while the third will be occupied by the sailor assistants."
"And they are already there?" asked Rob.
"Watch," smiled Lieutenant Murray.
He seized the whistle cord and blew three resounding blasts.
Instantly, from the large shed referred to as housing the submarine, four figures appeared, three wore sailor garb and the fourth, it could be seen, was in overalls and shirt sleeves.