THE SHADOW"Look, girls! There's a man!""Where?""Just creeping under the dining-room window!""What can he want-looks suspicious!""Oh, I'm afraid to go in!""Hush! We won't go in just now!""If only the boys were here!""Well, don't cry-they will be here soon.""See! He's getting under the fence! There he goes!""Did you get a look at him?""Yes, a good look. I'll know him next time."Bess, Belle and Cora were holding this whispered conversation. It was Belle, the timid, who wanted to cry, and it was Cora who had really seen the man-got the good look. Bess did say she wished the boys were around, but Bess had great confidence in those boys, and this remark, when a man was actually sneaking around Clover Cottage, was perfectly pardonable.The motor girls had just returned from a delightful afternoon ride along the shore road at Lookout Beach. Bess and Belle Robinson, otherwise Elizabeth and Isabel, the twins, were in their little car-the Flyaway-and Cora Kimball was driving her fine, four-cylinder touring affair, both machines having just pulled up in front of Clover Cottage, the summer home of the Robinsons."Did the boys say they would come directly from the post-office?" askedBelle, as she eyed the back fence suspiciously.