"What's the matter with the scene?" asked Alice. "I certainly struck him all right with the mud-guard." "Yes, that part was all right," Russ admitted. Alice had been running the automobile in the scene. "And didn't I do my first aid business well?" Ruth demanded. "Yes," Russ acknowledged. "Your part came out perfect. But just at the critical moment--you know, where Mr. Bunn was supposed to think he was dying and wanted to right the wrong he had done in cutting his daughter off in his will with only a dollar--some boys got in the way of the camera. They were outsiders, butting in, the way they always do when we film stuff in the park. It wouldn't have been so bad, only one of the youngsters began to pull off some funny stuff right in range of Mr. Bunn's agonized face. I didn't see him at the time, or I'd have stopped the running of the film. It was only when we got it in the projection room that we discovered it. "So Mr. Pertell ordered a retake of that one scene, and it's got to be done in a hurry. It won't take long. Mr. Bunn will meet us in the park. Be sure and wear the same things you had on that day. It won't do to have you get out of the auto in one dress, Ruth, and, a second later, kneel down beside Mr. Bunn in a gown entirely different." "All right, Russ, I'll be careful." "Oh, dear! But my packing!" sighed Alice. "I'll never get it done, and we must start for Oak Farm----" "Mr. Pertell will have to make allowances," said Russ, quickly. "Come on--move the boat! You won't be needed in the real war scenes for a couple of days, anyhow, though I suppose there'll be rehearsals. But it can't be helped. This retake is holding up the whole film, and it's to be released next week." Delaying only long enough to put on the proper dresses and to tell their father where they were going, Ruth and Alice DeVere were soon on their way to Central Park, where the scene was to be filmed, or photographed over again--a "retake," as it is called, the bane alike of camera men and directors. And while the girls--the moving picture girls--are on their way to do over a bit of work, I shall take the opportunity of telling my new readers something about Ruth and Alice DeVere. I have called them just what they are: "The Moving Picture Girls," and that is the title of the first volume of this series, which depicts them and their adventures. Their mother had died some years previously, leaving them to the care of their father, Hosmer DeVere, at one time a talented actor in the legitimate drama. But a throat affection forced him to give up his acting and, at the opening scene in the first volume, we find him and his daughters in rather straitened circumstances, living in a second-rate apartment house in New York. Across the hall dwelt Russ Dalwood, with his mother. Russ was a "camera man." That is, he took moving pictures in the big studios and out of doors for the Comet Film Company, of which Mr. Frank Pertell was manager and director.