A few moments later she turned again, and then presently, turned still a third time. "She's trying to lose us," whispered Bob. "Maybe not," said Hugh. "This is Elm Street." "Where's twelve eighty-two!" "On the next block." The white stucco house was on the same side of the street with the boys, and as Lena came opposite it she crossed over. Bob and Hugh stopped short under a large maple tree whose trunk cast a shadow affording ample protection from a nearby arclight. From this vantage point they watched the woman they were trailing. "She's going in," whispered Bob, clutching Hugh's arm excitedly. Lena turned in from the side walk and started toward the steps of the white stucco house, number twelve eighty-two. Half-way up she paused irresolutely. She acted as if she was puzzled as to what she should do; finally she turned, descended the steps rapidly and continued on down the street. "That was queer," whispered Bob. "It looked as though she lost her nerve." "Why should she be scared to go in where her gang is!" "Don't ask me. Come on." Once again they took up the chase. Lena seemed to walk more swiftly than ever now, and it was not an easy task to keep pace with her and still not be seen. The night was dark with low-hanging clouds, the street lamps affording the only light available. Ahead they could see the reflection from the lights of the main street of the city. "Do you suppose she dropped a note or anything on that porch back there?" demanded Hugh suddenly. "I didn't see her do anything like that," said Bob. "Nor I. At any rate I guess the best thing we can do is to stick close to her." "Yes, and we'd better keep closer too, now that we are coming to where the stores are. We'll lose track of her if we don't." "Do you suppose any one will notice that we're disguised?" "I hope not. There's usually a big crowd on the streets Saturday night though." "We'll hope for luck," said Hugh earnestly. They quickened their paces until they were scarcely more than seventy-five feet in back of Lena. There were many people passing them in both directions now, and apparently Lena was not as suspicious as she had been; she glanced behind her no more. Presently they turned into the main street. The sidewalks were thronged with people and everything was lighted up brilliantly in the glare of arclights and shop windows. Lena was just ahead of the boys and it was not an easy task to follow her in the crowd. Music sounded down the street. A troop of cavalry was approaching and every one lined the curb to see them pass. Lena stopped and the boys took their places directly behind her. Every trooper was mounted on a coal black horse, and they made a fine showing as they drew near; the crowd began to cheer and many waved small American flags that they were carrying. Women waved their handkerchiefs as the horsemen passed, and much to both Bob's and Hugh's surprise Lena waved her handkerchief and clapped her hands with the others.