David walked swiftly along, his mind in a perfect whirl. Now that once he had started he was eager to see the adventure through. It was strange, but stranger things had happened. More than one correspondent with queer personal experiences had taught him that. Nor was Steel in the least afraid. He was horribly frightened of disgrace or humiliation, but physical courage he had in a high degree. And was he not going to save his home and his good name?

David had not the least doubt on the latter score. Of course he would do nothing wrong, neither would he keep the money. This he preferred to regard as a loan—a loan to be paid off before long. At any rate, money or no money, he would have been sorry to have abandoned the adventure now.

His spirits rose as he walked along, a great weight had fallen from his shoulders. He smiled as he thought of his mother peacefully sleeping at home. What would his mother think if she knew? But, then, nobody was to know. That had been expressly settled in the bond.

Save for an occasional policeman the streets were deserted. It was a little cold and raw for the time of year, and a fog like a pink blanket was creeping in from the sea. Down in the Steine the big arc-lights gleamed here and there like nebulous blue globes; it was hardly possible to see across the road. In the half-shadow behind Steel the statue of the First Gentleman in Europe glowed gigantic, ghost-like in the mist.

It was marvellously still there, so still that David could hear the tinkle of the pebbles on the beach. He stood back by the gate of the gardens watching the play of the leaf silhouettes on the pavement, quaint patterns of fantastic designs thrown up in high relief by the arc-light above. From the dark foggy throat of St. James's Street came the tinkle of a cycle bell. On so still a night the noise seemed bizarre and out of place. Then the cycle loomed in sight; the rider, muffled and humped over the front wheel, might have been a man or a woman. As the cyclist flashed by something white and gleaming dropped into the road, and the single word "Come" seemed to cut like a knife through the fog. That was all; the rider had looked neither to the right nor to the left, but the word was distinctly uttered. At the same instant an arm dropped and a long finger pointed to the gleaming white square in the road. It was like an instantaneous photograph—a flash, and the figure had vanished in the fog.

"This grows interesting," Steel muttered. "Evidently my shadowy friend has dropped a book of rules in the road for me. The plot thickens."

It was only a plain white card that lay in the road. A few lines were typed on the back of it. The words might have been curt, but they were to the point:—

"Go along the sea front and turn into Brunswick Square. Walk along the right side of the square until you reach No. 219. You will read the number over the fanlight. Open the door and it will yield to you; there is no occasion to knock. The first door inside the hall leads to the dining-room. Walk into there and wait. Drop this card down the gutter just opposite you."

David read the directions once or twice carefully. He made a mental note of 219. After that he dropped the card down the drain-trap nearest at hand. A little way ahead of him he heard the cycle bell trilling as if in approval of his action. But David had made up his mind to observe every rule of the game. Besides, he might be rigidly watched.

The spirit of adventure was growing upon Steel now. He was no longer holding the solid result before his eyes. He was ready to see the thing through for its own sake. And as he hurried up North Street, along Western Road, and finally down Preston Street, he could hear the purring tinkle of the cycle bell before him. But not once did he catch sight of the shadowy rider.

All the same his heart was beating a little faster as he turned into Brunswick Square. All the houses were in pitchy darkness, as they naturally would be at one o'clock in the morning, so it was only with great difficulty that Steel could make out a number here and there. As he walked slowly and hesitatingly along the cycle bell drummed impatiently ahead of him.

"A hint to me," David muttered. "Stupid that I should have forgotten the directions to read the number over the fanlight. Also it is logical to suppose that I am going to find lights at No. 219. All right, my friend; no need to swear at me with that bell of yours."

He quickened his pace again and finally stopped before one of the big houses where lights were gleaming from the hall and dining-room windows. They were electric lights by their great power, and, save for the hall and dining-room, the rest of the house lay in utter darkness. The cycle bell let off an approving staccato from behind the blankety fog as Steel pulled up.

There was nothing abnormal about the house, nothing that struck the adventurer's eye beyond the extraordinary vividness of the crimson blind. The two side-windows of the big bay were evidently shuttered, but the large centre gleamed like a flood of scarlet overlaid with a silken sheen. Far across the pavement the ruby track struck into the heart of the fog.

"Vivid note," Steel murmured. "I shall remember that impression."

He was destined never to forget it, but it was only one note in the gamut of adventure now. With a firm step he walked up the marble flight and turned the handle. It felt dirty and rusty to the touch. Evidently the servants were neglectful, or they were employed by people who had small regard for outward appearances.

The door opened noiselessly, and Steel closed it behind him. A Moorish lantern cast a brilliant flood of light upon a crimson carpet, a chair, and an empty oak umbrella-stand. Beyond this there was no atom of furniture in the hall. It was impossible to see beyond the dining-room door, for a heavy red velvet curtain was drawn across. David's first impression was the amazing stillness of the place. It gave him a queer feeling that a murder had been committed there, and that everybody had fled, leaving the corpse behind. As David coughed away the lump in his throat the cough sounded strangely hollow.

He passed into the dining-room and looked eagerly about him. The room was handsomely furnished, if a little conventional—a big mahogany table in the centre, rows of mahogany chairs upholstered in morocco, fine modern prints, most of them artist's proofs, on the walls. A big marble clock, flanked by a pair of vases, stood on the mantelshelf. There were a large number of blue vases on the sideboard. The red distemper had faded to a pale pink in places.

"Tottenham Court Road," Steel smiled to himself. "Modern, solid, expensive, but decidedly inartistic. Ginger jars fourteen guineas a pair, worth about as many pence. Moneyed people, solid and respectable, of the middle class. What brings them playing at mystery like this?"

The room was most brilliantly lighted both from overhead and from the walls. On the shining desert of the dining-table lay a small, flat parcel addressed to David Steel, Esq. The novelist tore off the cover and disclosed a heap of crackling white papers beneath. Rapidly he fluttered the crisp sheets over—seventy-five Bank of England notes for £10 each.

It was the balance of the loan, the price paid for Steel's presence. All he had to do now was to place the money in his pocket and walk out of the house. A few steps and he would be free with nobody to say him nay. It was a temptation, but Steel fought it down. He slipped the precious notes into his pocket and buttoned his coat tightly over them. He had no fear for the coming day now.

"And yet," he murmured, "what of the price I shall have to pay for this?"

Well, it was worth a ransom. And, so long as there was nothing dishonourable attached to it, Steel was prepared to redeem his pledge. He knew perfectly well from bitter experience that the poor man pays usurious rates for fortune's favours. And he was not without a strange sense of gratitude. If—

Click, click, click. Three electric switches were snapped off almost simultaneously outside, and the dining-room was plunged into pitchy darkness. Steel instantly caught up a chair. He was no coward, but he was a novelist with a novelist's imagination. As he stood there the sweetest, most musical laugh in the world broke on his ear. He caught the swish of silken drapery and the subtle scent that suggested the fragrance of a woman's hair. It was vague, undefined, yet soothing.

"Pray be seated, Mr. Steel," the silvery voice said. "Believe me, had there been any other way, I would not have given you all this trouble. You found the parcel addressed to you? It is an earnest of good faith. Is not that a correct English expression?"

David murmured that it was. But what did the speaker mean? She asked the question like a student of the English language, yet her accent and phrasing were perfect. She laughed again noiselessly, and once more Steel caught the subtle, entrancing perfume.

"I make no further apology for dragging you here at this time," the sweet voice said. "We knew that you were in the habit of sitting up alone late at night, hence the telephone message. You will perhaps wonder how we came to know so much of your private affairs. Rest assured that we learnt nothing in Brighton. Presently you may gather why I am so deeply interested in you; I have been for the past fortnight. You see, we were not quite certain that you would come to our assistance unless we could find some means of coercing you. Then we go to one of the smartest inquiry agents in the world and say: 'Tell us all about Mr. David Steel without delay. Money is no object.' In less than a week we know all about Beckstein. We leave matters till the last moment. If you only knew how revolting it all was!"

"So your tone seems to imply, madam," Steel said, drily.

"Oh, but truly. You were in great trouble, and we found a way to get you out. At a price; ah, yes. But your trouble is nothing compared with mine—which brings me to business. A fortnight ago last Monday you posted to Mr. Vanstone, editor of the Piccadilly Magazine, the synopsis of the first four or five chapters of a proposed serial for the journal in question. You open that story with a young and beautiful woman who is in deadly peril. Is not that so?"

"Yes," Steel said, faintly. "It is just as you suggest. But how—"

"Never mind that, because I am not going to tell you. In common parlance—is not that the word?—that woman is in a frightful fix. There is nothing strained about your heroine's situation, because I have heard of people being in a similar plight before. Mr. Steel, I want you to tell me truthfully and candidly, can you see the way clear to save your heroine? Oh, I don't mean by the long arm of coincidence or other favourite ruses known to your craft. I mean by common sense, logical methods, by brilliant ruses, by Machiavelian means. Tell me, do you see a way?"

The question came eagerly, almost imploringly, from the darkness. David could hear the quick gasps of his questioner, could catch the rustle of the silken corsage as she breathed.

"Yes," he said, "I can see a brilliant way out that would satisfy the strictest logician. But you—"

"Thank Heaven! Mr. Steel, I am your heroine. I am placed in exactly the same position as the woman whose story you are going to write. The setting is different, the local colouring is not the same, but the same deadly peril menaces me. For the love of Heaven hold out your hand to save a lonely and desperate woman whose only crime is that she is rich and beautiful. Providence had placed in my hands the gist of your heroine's story. Hence this masquerade; hence the fact that you are here to-night. I have helped you—help me in return."

It was some time before Steel spoke.

"It shall be as you wish," he said. "I will tell you how I propose to save my heroine. Her sufferings are fiction; yours will be real. But if you are to be saved by the same means, Heaven help you to bear the troubles that are in front of you. Before God, it would be more merciful for me to be silent and let you go your own way."