"But it's extraordinary that somebody should live here without my aunt's knowledge."
"It is. But there are dozens of people hidden away in London people believed by their friends to be dead, or abroad," he said. "In a great city like ours it is quite easy to hide, providing that one is concealed by a trusty friend. I wonder," he added, "how many people whose obituary notices have appeared in the papers are living in secret in upstairs rooms or down in cellars, dragging out their lives in self-imprisonment, yet buoyed by the hope that one day they may, when changed in appearance by years, reappear among their fellow-men and laugh up their sleeves because nobody recognises them."
"Really, do you honestly think that Mr. Boyne is concealing somebody here?" asked the girl anxiously.
"Everything points to it a light in the room, and a clock."
"But why should he pay visits to him in disguise?"
"Ah! That's quite another matter. We have yet to discover the motive. And we can only do so by watching vigilantly."
Then he described to her how he had pulled away the mat from before the door, and how the light had been revealed.
"Well," exclaimed the girl. "I'm greatly puzzled over the whole affair. May I not be frank with auntie, and tell her what we suspect?"
"By no means," he answered. "It would be most injudicious. It would only alarm her, and upset any plans we may make."
"I wonder who can really be up there?"
"Some very close friend of this Mr. Boyne, without a doubt. He must have some strange motive for concealing him."
"But if he's a friend, why does he disguise himself when he visits him?" queried the girl.
"Yes, that's just the point. There's something very curious about the whole affair," declared the young man. "When your aunt is in bed, he goes up, evidently to take his friend food and drink. And yet he puts on a gown which makes him look as you have described it like a Spanish Inquisitor."
"Only all in white. Why white?"
"Can it be that the person upstairs is not self-imprisoned?" suggested the young man, as a sudden thought occurred to him. "Can it be that whoever is confined there is without proper mental balance? Solitary confinement produces madness, remember. In Italy, where solitary confinement for life takes the place of capital punishment for murder, the criminal always ends his days as a lunatic driven mad by that terrible loneliness which even a dog could not suffer."
"That's certainly quite another point of view," she remarked. "I hadn't thought of that!"
"Well, it is one to bear in mind," he said. "Your aunt, a most worthy lady, is devoted to Mr. Boyne and serves him well. For the present let her hold him in high esteem. In the meantime we will watch, and endeavour to solve this mystery, Marigold."
Hardly had the words left his mouth, when the old lady entered the room with two cups of tea upon a brass tray.
"There!" she said, addressing Marigold. "I know you like a cup o' tea at this hour of the evening, and I hope, Mr. Durrant, it will be to your liking. Mr. Boyne often has a cup out of my teapot if he gets home before I go to bed."
"It's awfully good of you, auntie," the girl declared. "I know Mr. Durrant highly appreciates it."
"That's all right," laughed the old lady. "I'll soon be going to bed. It's near ten o'clock now."
Gerald glanced at his wrist-watch and saw that it was just ten.
Then, when Mrs. Felmore had gone, he said to the girl:
"Hadn't we better be going? Boyne will be back soon."
"Right," she said, drinking her tea daintily. "I'll go down and unfasten the basement door. Auntie has no doubt bolted it. Then, when she's gone to bed, we can get in again."
And a few moments later she left him. Five minutes later she reappeared, followed by Mrs. Felmore.
"Auntie is going to bed," she said. "We must be off, Gerald."
The young man rose, smiled pleasantly, and shook the deaf woman's hand in farewell. Then, a few moments later, the young pair descended the front steps and left the house.
About ten minutes later, however, they returned to it, slipping unobserved down the area steps. Marigold turned the handle of the door, and in the darkness they both entered the kitchen, where they waited eagerly, without lighting the gas, and conversing only in whispers. Mrs. Felmore had gone upstairs, and stone-deaf that she was, would hear no noise below.
She had left the gas turned low in the hall in readiness for her master's return, retiring fully satisfied with the appearance and manners of the young man to whom her niece had that night introduced her.
The pair, waiting below in the darkness, remained eagerly on the alert.
It was a quarter past ten, and Bernard Boyne might return at any time. But each minute which passed seemed an hour, so anxious and puzzled were they, and at every noise they held their breath and waited.
At last footsteps sounded outside somebody ascending the stone steps above and next second there was a click as a key was put into the latch of the front door.
"Here he is at last!" the girl whispered. "Now we'll watch!"
They watched together and by doing so learned some very strange facts.
CHAPTER VII
WHAT HAPPENED IN BRIDGE PLACE
Together Marigold and her lover crept up the kitchen stairs in the darkness, and heard Mr. Boyne moving about in the front parlour.
They heard him yawn as he threw off his coat, for the night was sultry, and there were sounds which showed that he was eating his evening meal. They heard the loud fizzing as he unscrewed a bottle of beer, and the noise of a knife and fork upon the plate, for he had left the door open.
After about ten minutes, for he seemed to eat his supper hurriedly, he flung off his boots, and in his socks crept upstairs to Mrs. Felmore's door, apparently to satisfy himself that she had retired.
"Hadn't we better get down," suggested Durrant, in a low whisper. "He may take it into his head to come down and search here."
"No, he never comes into the kitchen. So long as auntie has gone to bed he does not mind. Let's wait and watch."
This they did. After a few moments Mr. Boyne came down again and walked along the narrow passage back to his room, satisfied that all was quiet.
He had removed his boots, apparently for some other purpose than to be able to move about in silence, for however heavily he trod his old housekeeper would not hear him. Perhaps, however, he feared that her sense of feeling had been so highly developed that she might have detected the vibration caused by his footsteps.
He remained for nearly a quarter of an hour in his room, while the pair stood breathless in the darkness.
"This is just what happened when I last watched," the girl whispered into the ear of the young man who held her arm affectionately in the darkness.
"I wonder when he'll come out," remarked young Durrant, highly excited over the curious adventure. That something remarkable was afoot was proved by the man's action in ascending the stairs to ascertain that his housekeeper had retired and would not disturb his movements.
At last they heard a soft movement, and next moment, peering over the banisters, they saw a tall, ghostly form clad from top to toe in a long, loose white gown advancing to the stairs.
In one hand he carried a glass jug filled with water, and in the other a plate piled with bread and other food.
"See!" whispered Durrant. "There is somebody upstairs in that locked room. He's carrying food and water to his prisoner!"
"Hush!" the girl said softly, and in excitement. "He may hear you! He's very quick!"
But the strange occupant of the house had already ascended out of view, and a few moments later they heard a click as he put his key into the Yale lock of the closed room.