"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.