“My brother is resting with a relative in England,” she narrated. “Father has gone to bring him home. If you are a thousand miles away from Washington when they return, you must promise, all three of you, to come to the family reunion, of which you are surely members, as friends and brothers. Father and brother will have something interesting to say to you. We are very, very grateful—and, oh, so proud of you!”

“It’s worth something to find a little sister like that,” cried Hiram, as their visitor left them, all sunny smiles and happiness.

“‘Something interesting’ means a right royal reward, of course,” spoke Elmer. “Why, fellows, if we keep on, we’ll soon have the capital to start an aero meet all our own!”

It was just a week after that, early one morning, that the airship boys, seated in the aero association club room, were hailed joyously by an unexpected visitor.

“Why, Mr. Hull!” exclaimed Dave, greeting the newcomer warmly.

The shipwrecked mariner looked like a new man. He wore a spick and span suit, and was cleanly shaven. He seemed well fed and happy.

“Missed you at Rio,” he announced; “but knew you’d do the square thing. Met a chum who financed me, and came on to get my keg.”

“Which is safe and sound in the storage room here,” announced our hero.

“Well, all we’ve got to do is to get it hauled down to a chemical works in Washington to get our money—half of it is yours,” observed the old salt.

“Say, Mr. Hull,” broke in the irrepressible Hiram; “what in the world is in that keg, anyway?”