though Tom could not see them for two reasons. One was that Ned was sitting behind him, and the other was that Ned wore heavy goggles, as did the young pilot. Also, they had to carry on their talk through the speaking tube arrangement. "Yes, it is a bit like old times," agreed Tom. "We've had some great old experiences together, Ned, haven't we?" "We surely have! I wonder if we'll have any more? When we were in the submarine, and in your big airship Say, that big one is the one I always liked! I like big things." "Do you?" asked Tom. "Well, maybe, when I get--" But Tom did not finish, for the Hawk unexpectedly poked her nose into an empty pocket in the air just then, and needed a firm hand on the controls. Furthermore, Tom decided against making the confidence that was on the tip of his tongue. At last the aircraft was straightened out and the pilot guided her on toward the army encampment. "That's the place I'd like to be," called Ned through the tube as the faint, sweet notes of a bugle floated up from the parade ground. "Yes, it would be great," admitted Tom. "But there are other things to do for Uncle Sam besides wearing khaki." "Tom's up to some game," mused Ned. "I mustn't judge him too hastily, or I might make a mistake. And Mary mustn't, either. I'll tell her so." For Mary Nestor had spoken to Ned concerning Tom, and the curiously secretive air about certain of his activities. And the girl, moreover, had spoken rather coldly of her friend. Ned did not like this. It was not like Mary and Tom to be at odds. Once more the Hawk came to the ground, this time near the airship sheds adjoining the Swift works. Just as Tom and Ned alighted, one of the workmen summoned the young inventor toward the shop, which was so closely guarded by Koku and Eradicate on the outside. "I'll have to leave you, Ned," remarked Tom, as he turned away from his chum. "There's a conference on about a new invention." "Oh, that's all right. Business is business, you know.