Each was the residence of a physician, and in each, in the upper stories, the blinds were drawn. From the front there was nothing to be learned, and in the hope that the rear might furnish some clew, Ford hastened to Wimpole Street, in which the houses to the east backed upon those to the west in Sowell Street. These houses were given over to furnished lodgings, and under the pretext of renting chambers, it was easy for Ford to enter them, and from the apartments in the rear to obtain several hasty glimpses of the backs of the three houses in Sowell Street. But neither from this view-point did he gather any fact of interest. In one of the three houses in Sowell Street iron bars were fastened across the windows of the fourth floor, but in private sanatoriums this was neither unusual nor suspicious. The bars might cover the windows of a nursery to prevent children from falling out, or the room of some timid householder with a lively fear of burglars.
In a quarter of an hour Ford was again back in Sowell Street no wiser than when he had entered it. From the outside, at least, the three houses under suspicion gave no sign. In the problem before him there was one point that Ford found difficult to explain. It was the only one that caused him to question if the letter was genuine. What puzzled him was this: Why, if the girl were free to throw two notes from the window, did she not throw them out by the dozen? If she were able to reach a window, opening on the street, why did she not call for help? Why did she not, by hurling out every small article the room contained, by screams, by breaking the window-panes, attract a crowd, and, through it, the police? That she had not done so seemed to show that only at rare intervals was she free from restraint, or at liberty to enter the front room that opened on the street. Would it be equally difficult, Ford asked himself, for one in the street to communicate with her? What signal could he give that would draw an answering signal from the girl?
Standing at the corner, hidden by the pillars of a portico, the water dripping from his rain-coat, Ford gazed long and anxiously at the blank windows of the three houses. Like blind eyes staring into his, they told no tales, betrayed no secret. Around him the commonplace life of the neighborhood proceeded undisturbed.
Somewhere concealed in the single row of houses a girl was imprisoned, her life threatened; perhaps even at that moment she was facing her death. While, on either side, shut from her by the thickness only of a brick wall, people were talking, reading, making tea, preparing the evening meal, or, in the street below, hurrying by, intent on trivial errands. Hansom cabs, prowling in search of a fare, passed through the street where a woman was being robbed of a fortune, the drivers occupied only with thoughts of a possible shilling; a housemaid with a jug in her hand and a shawl over her bare head, hastened to the near-by public- house; the postman made his rounds, and delivered comic postal-cards; a policeman, shedding water from his shining cape, halted, gazed severely at the sky, and, unconscious of the crime that was going forward within the sound of his own footsteps, continued stolidly into Wimpole Street.
A hundred plans raced through Ford's brain; he would arouse the street with a false alarm of fire and lead the firemen, with the tale of a smoking chimney, to one of the three houses; he would feign illness, and, taking refuge in one of them, at night would explore the premises; he would impersonate a detective, and insist upon his right to search for stolen property. As he rejected these and a dozen schemes as fantastic, his brain and eyes were still alert for any chance advantage that the street might offer. But the minutes passed into an hour, and no one had entered any of the three houses, no one had left them. In the lower stories, from behind the edges of the blinds, lights appeared, but of the life within there was no sign. Until he hit upon a plan of action, Ford felt there was no longer anything to be gained by remaining in Sowell Street. Already the answer to his cable might have arrived at his rooms; at Gerridge's he might still learn something of Pearsall. He decided to revisit both these places, and, while so engaged, to send from his office one of his assistants to cover the Sowell Street houses. He cast a last, reluctant look at the closed blinds, and moved away. As he did so, two itinerant musicians dragging behind them a small street piano on wheels turned the corner, and, as the rain had now ceased, one of them pulled the oil-cloth covering from the instrument and, seating himself on a camp- stool at the curb, opened the piano. After a discouraged glance at the darkened windows, the other, in a hoarse, strident tenor, to the accompaniment of the piano, began to sing. The voice of the man was raucous, penetrating. It would have reached the recesses of a tomb.
"She sells sea-shells on the sea-shore," the vocalist wailed. "The shells she sells are sea-shells, I'm sure."The effect was instantaneous. A window was flung open, and an indignant householder with one hand frantically waved the musicians away, and with the other threw them a copper coin.
At the same moment Ford walked quickly to the piano and laid a half-crown on top of it.
"Follow me to Harley Street," he commanded. "Don't hurry. Take your time. I want you to help me in a sort of practical joke. It's worth a sovereign to you."He passed on quickly. When he glanced behind him, he saw the two men, fearful lest the promised fortune might escape them, pursuing him at a trot. At Harley Street they halted, breathless.
"How long," Ford demanded of the one who played the piano, "will it take you to learn the accompaniment to a new song?""While you're whistling it," answered the man eagerly.
"And I'm as quick at a tune as him," assured the other anxiously.
"I can sing----"
