"Good stunt on for to-morrow," said Russ, coming up behind Ruth, and taking a chair near her. "What is it?" asked Paul, who was with Alice. "Any more fort stuff?" "No, but it's out near the fort. Mr. Pertell is arranging for a motor boat race, with you girls in rival boats. You know there is a speed course on Mantanzas Bay, and he's hired two of the fast boats. It's going to be a regular race, for the two fellows who run the boats are real water rivals. "Mr. Pertell has induced them to act the parts for him, and there'll be some fun. Part of our company is to be in one boat, and part in the other, and some will be on the fort wall, outside the old moat, watching the boats come up. It ought to make a dandy picture." "I'm sure it will," declared Ruth, who was always interested in the mechanical end, as well as in the artistic side. Russ had taught her considerable about the technical part of the business of making moving pictures. "A motor boat race will be simply fine!" Alice exclaimed. "I hope the boat I am in wins." "There's no telling," Russ went on. "As I said, the men who own the boats are real rivals, so each will do his best to come out ahead. There'll be no fake about this--if you'll excuse the use of slang," he added. That evening, seated in the palm garden, Mr. Pertell explained to his company something of the plans for the next day, telling of the plot of the play in which the motor boat race was to figure. "That sounds interesting," commented Mr. DeVere. "Do those boats go very fast?" inquired Mr. Sneed. "Rather--they are two of the fastest boats in the world," answered the manager. "Then there's sure to be an accident," predicted the grouchy actor. "I think you may count me out of this play, Mr. Pertell. I have had enough of water stuff." "Well, you're due to have a bit more," observed Mr. Pertell, drily. "For you fall overboard from one of the boats, at the conclusion of the race." "I fall overboard!" was the startled exclamation. "Yes, and Mr. Bunn dives in after you. You are both good swimmers--you remember you told me so." The use of the dock of the St. Augustine Power Boat Club had been loaned for the making of the moving picture, and next day, with such of his company as were to go in the boats, Mr. Pertell went to the float. Others of the players took their places on the wall of the fort. Two cameras were to be used, Russ working one to show the start and finish of the race, and Pop Snooks the other, to depict the action of the players not in the boats. The motor boats were powerful and handsome craft. The skippers of each were at the wheel as the players took their places, and each boat carried a blackened and greasy mechanician, as looking after high-powered motors was no simple matter. "Well, are we all ready?" asked the manager, as he assigned the players to their places. "All ready, sir," answered Mr. DeVere.