As he finished speaking, Grace heard someone approaching her from behind, but she paid no attention. In a moment the attendant touched her lightly on the arm. She turned, gazing at the woman with staring, unseeing eyes. The latter looked at her keenly, then began to lead her along the bridge toward the main building.

When they reached her bedroom, the nurse turned on the lights suddenly, glancing at Grace's face as she did so. The girl did not dare even to blink her eyes. "Sit down," the woman commanded, sharply. Grace sank upon the edge of the bed. "Take off your shoes," the nurse went on, in a stern voice. The girl had slipped on a pair of bedroom slippers—she proceeded to remove them mechanically, fumbling with them as though trying to unfasten the laces of a pair of shoes. "Now your dress," the nurse ordered. Grace began awkwardly to remove the dressing-gown she had thrown about her. When the woman told her sharply to get into bed, she did so without a word, apparently quite unconscious of what she was doing. It was a splendid piece of acting, and she did it so well that if the nurse had any doubts as to the reality of her somnambulistic condition they were at once dispelled. As soon as the girl placed her head upon the pillows, she pretended to be sound asleep, her eyes closed, her breathing regular and slow. After a time, the attendant put out the light and left the room.

The girl lay still for hours, wondering what there was in the strange conversation she had overheard that could help Richard in his efforts to recover the stolen snuff box. That it had been stolen she knew; that it had not yet been delivered to Dr. Hartmann she also knew. Perhaps Richard might have succeeded in recovering it before now; if not, the messenger bringing it to the doctor's office would undoubtedly arrive the next day. She determined to rise early, in order that she might, if possible, send word of what she had heard to Brussels by means of the young man who drove the delivery wagon.


CHAPTER VI

When Richard Duvall left Dufrenne, the curio dealer, in Piccadilly Circus, and started after the man who had purchased the box of powder in the barber shop, he realized to the full the hopelessness of his task. The man had left the shop at least two minutes before Dufrenne came out—perhaps more, and another minute had been consumed by the latter in telling his story. Three minutes' start, in a crowded street at night, was a handicap which the detective could scarcely hope to overcome.

He hurried along in the general direction the fellow had taken, trying to form in his mind a clear picture of his appearance. In the dim light before the shop he had not been able to observe him closely, nor had there, indeed, appeared any very good reason for doing so; he had thought the man but a belated customer of the place and had barely glanced at him.

His experience in summing up at a glance the general characteristics of those he met, however, stood him in good stead—he remembered that the man had worn a long brown overcoat, a derby hat, and carried in his hand a small satchel. The latter, which Dufrenne had failed to mention, indicated a traveler—the man's words to Seltz, on purchasing the box of powder, seemed to confirm it. The man had walked, apparently, instead of taking a cab. Charing Cross station was but a short distance away. What more natural, Duvall reasoned, than that the man he was following, was on his way to take a train?

Following this line of reasoning, the detective walked hastily in the direction of Charing Cross, dodging in and out among the passers-by, and eying keenly everyone he met, in the hope that he might discover the man with the satchel. He was, however, doomed to disappointment. After spending over fifteen minutes in Charing Cross station, watching the crowds at the booking offices, the telegraph and telephone booths and the restaurant, he concluded that he had been mistaken in his course of reasoning and reluctantly turned his steps once more toward the shop of M. Perrier. There was, of course, still the chance that his deductions had been wrong. Seltz might still have the snuff box in his possession, and the man with the satchel be merely a harmless individual who used rice powder after shaving. He almost reproached himself for having wasted so much time, and hurried along through Piccadilly Circus, in a state of considerable perplexity.

As he came up to the shop, he saw Dufrenne standing before the window, his eyes glued to the pane. Something in his astonished expression attracted the detective's attention at once. He tapped the curio dealer lightly on the shoulder.