“We must have a house in London as well, and run up for the season. I don't, of course, like to make suggestions now, but it will be different afterwards. I am sure that Raffles will do it if I ask him. It is all very well for him to say that he does not want any thanks or honours, but I should like to know what is the use of being a public benefactor if you are to have no return for it. I am sure that if he does only half what he talks of doing, they will make him a peer—Lord Tamfield, perhaps—and then, of course, I shall be my Lady Tamfield, and what would you think of that, Bob?” She dropped him a stately curtsey, and tossed her head in the air, as one who was born to wear a coronet.

“Father must be pensioned off,” she remarked presently. “He shall have so much a year on condition that he keeps away. As to you, Bob, I don't know what we shall do for you. We shall make you President of the Royal Academy if money can do it.”

It was late before they ceased building their air-castles and retired to their rooms. But Robert's brain was excited, and he could not sleep. The events of the day had been enough to shake a stronger man. There had been the revelation of the morning, the strange sights which he had witnessed in the laboratory, and the immense secret which had been confided to his keeping. Then there had been his conversation with his father in the afternoon, their disagreement, and the sudden intrusion of Raffles Haw. Finally the talk with his sister had excited his imagination, and driven sleep from his eyelids. In vain he turned and twisted in his bed, or paced the floor of his chamber. He was not only awake, but abnormally awake, with every nerve highly strung, and every sense at the keenest. What was he to do to gain a little sleep? It flashed across him that there was brandy in the decanter downstairs, and that a glass might act as a sedative.

He had opened the door of his room, when suddenly his ear caught the sound of slow and stealthy footsteps upon the stairs. His own lamp was unlit, but a dim glimmer came from a moving taper, and a long black shadow travelled down the wall. He stood motionless, listening intently. The steps were in the hall now, and he heard a gentle creaking as the key was cautiously turned in the door. The next instant there came a gust of cold air, the taper was extinguished, and a sharp snap announced that the door had been closed from without.

Robert stood astonished. Who could this night wanderer be? It must be his father. But what errand could take him out at three in the morning? And such a morning, too! With every blast of the wind the rain beat up against his chamber-window as though it would drive it in. The glass rattled in the frames, and the tree outside creaked and groaned as its great branches were tossed about by the gale. What could draw any man forth upon such a night?

Hurriedly Robert struck a match and lit his lamp. His father's room was opposite his own, and the door was ajar. He pushed it open and looked about him. It was empty. The bed had not even been lain upon. The single chair stood by the window, and there the old man must have sat since he left them. There was no book, no paper, no means by which he could have amused himself, nothing but a razor-strop lying on the window-sill.

A feeling of impending misfortune struck cold to Robert's heart. There was some ill-meaning in this journey of his father's. He thought of his brooding of yesterday, his scowling face, his bitter threats. Yes, there was some mischief underlying it. But perhaps he might even now be in time to prevent it. There was no use calling Laura. She could be no help in the matter. He hurriedly threw on his clothes, muffled himself in his top-coat, and, seizing his hat and stick, he set off after his father.

As he came out into the village street the wind whirled down it, so that he had to put his ear and shoulder against it, and push his way forward. It was better, however, when he turned into the lane. The high bank and the hedge sheltered him upon one side. The road, however, was deep in mud, and the rain fell in a steady swish. Not a soul was to be seen, but he needed to make no inquiries, for he knew whither his father had gone as certainly as though he had seen him.

The iron side gate of the avenue was half open, and Robert stumbled his way up the gravelled drive amid the dripping fir-trees. What could his father's intention be when he reached the Hall? Was it merely that he wished to spy and prowl, or did he intend to call up the master and enter into some discussion as to his wrongs? Or was it possible that some blacker and more sinister design lay beneath his strange doings? Robert thought suddenly of the razor-strop, and gasped with horror. What had the old man been doing with that? He quickened his pace to a run, and hurried on until he found himself at the door of the Hall.

Thank God! all was quiet there. He stood by the big silent door and listened intently. There was nothing to be heard save the wind and the rain. Where, then, could his father be? If he wished to enter the Hall he would not attempt to do so by one of the windows, for had he not been present when Raffles Haw had shown them the precautions which he had taken? But then a sudden thought struck Robert. There was one window which was left unguarded. Haw had been imprudent enough to tell them so. It was the middle window of the laboratory. If he remembered it so clearly, of course his father would remember it too. There was the point of danger.