She did not think of it at the time, but afterwards she recalled how in acknowledging his courtesy she had stepped back a little and almost stumbled over a page, a boy about George's age, who had been standing withdrawn into the shadow of the deep window. She remembered he had a keen intelligent look, and had apologized and vanished immediately. A moment later it seemed to be the same boy in blue clothes and gilt buttons who held the outer door open for them to pass out--or was this a taller one? She glanced again at his side face with a lingering thought of George as she paused to fasten her glove and slip her note-book into her hand-bag. "I think I will put you into the taxi and let you go right back to the station while I attend to another errand over at the War Department. It won't take me long. We can easily catch that four-o'clock train back. I suppose you are anxious to get back to-night?" "Oh, yes," said Shirley earnestly, "I must, if possible. Mother isn't well and she worries so easily." "Well, I don't know why we can't. Then perhaps you can come up to town to-morrow and type those notes for us. By the way, I guess it would be better for me to take them and lock them in the safe to-night. No, don't stop to get them out now"--as Shirley began to unfasten her bag and get the note-book out--"We haven't much time if we want to catch that train. Just look after them carefully and I'll get them when we are on the train." He helped her into the taxi, gave the order, "To the station," and touching his hat, went rapidly over to the War Department Building. No one saw a boy with a blue cap and brass buttons steal forth on a bicycle from the court just below the office, and circling about the asphalt uncertainly for a moment, shoot off across the park. Shirley sat up very straight and kept her eyes about her. She was glad they were taking another way to the station so that she might see more. When she got there she would write another postal and perhaps it would go on the same train with her. It was all too short, that ride up Pennsylvania Avenue and around by the Capitol. Shirley gathered up her bag and prepared to get out reluctantly. She wished she might have just one more hour to go about, but of course that would be impossible if she wished to reach home to-night. But before the driver of the car could get down and open the door for her to get out a boy with a bicycle slid up to the curb and touching his gilt-buttoned cap respectfully said: "Excuse me, Miss, but Mr. Barnard sent me after you. He says there's been some mistake and you'll have to come back and get it corrected." "Oh!" said Shirley, too surprised to think for a minute. "Oh! Then please hurry, for Mr. Barnard wants to get back in time to get that four-o'clock train." The driver frowned, but the boy stepped up and handed him something, saying: