He stepped back in the doorway, looked out, then turned to them again.
"I come in, please?" he said pathetically, his hands quivering.
"I not like to stay in dark." Miss Cornelia took pity on him.
"Come in, Billy, of course. What is it? Anything the matter?" Billy glanced about nervously.
"Man with sore head."
"What about him?"
"Act very strange." Again Billy's slim hands trembled.
Beresford broke in. "The man who fell into the room downstairs?" Billy nodded.
"Yes. On second floor, walking around." Beresford smiled, a bit smugly.
"I told you!" he said to Miss Cornelia. "I didn't think he was as dazed as he pretended to be."
Miss Cornelia, too, had been pondering the problem of the Unknown. She reached a swift decision. If he were what he pretended to be - a dazed wanderer, he could do them no harm. If he were not - a little strategy properly employed might unravel the whole mystery.
"Bring him up here, Billy," she said, turning to the butler.
Billy started to obey. But the darkness of the corridor seemed to appall him anew the moment he took a step toward it.
"You give candle, please?" he asked with a pleading expression. "Don't like dark."
Miss Cornelia handed him one of the two precious candles. Then his present terror reminded her of that one other occasion when she had seen him lose completely his stoic Oriental calm."Billy," she queried, "what did you see when you came running down the stairs before we were locked in, down below?"
The candle shook like a reed in Billy's's grasp.
"Nothing!" he gasped with obvious untruth, though it did not seem so much as if he wished to conceal what he had seen as that he was trying to convince himself he had seen nothing.
"Nothing!" said Lizzie scornfully. "It was some nothing that would make him drop a bottle of whisky!"
But Billy only backed toward the door, smiling apologetically.
"Thought I saw ghost," he said, and went out and down the stairs, the candlelight flickering, growing fainter, and finally disappearing. Silence and eerie darkness enveloped them all as they waited. And suddenly out of the blackness came a sound.
Something was flapping and thumping around the room.
"That's damned odd." muttered Beresford uneasily. "There is something moving around the room.
"It's up near the ceiling!" cried Bailey as the sound began again. Lizzie began a slow wail of doom and disaster.
"Oh - h - h - h - "
"Good God!" cried Beresford abruptly. "It hit me in the face!" He slapped his hands together in a vain attempt to capture the flying intruder.
Lizzie rose.
"I'm going!" she announced. "I don't know where, but I'm going!"
She took a wild step in the direction of the door. Then the flapping noise was all about her, her nose was bumped by an invisible object and she gave a horrified shriek.
"It's in my hair!" she screamed madly. "It's in my hair!" The next instant Bailey gave a triumphant cry.
"I've got it! It's a bat!"Lizzie sank to her knees, still moaning, and Bailey carried the cause of the trouble over to the window and threw it out.
But the result of the absurd incident was a further destruction of their morale. Even Beresford, so far calm with the quiet of the virtuous onlooker, was now pallid in the light of the matches they successively lighted. And onto this strained situation came at last Billy and the Unknown.
The Unknown still wore his air of dazed bewilderment, true or feigned, but at least he was now able to walk without support. They stared at him, at his tattered, muddy garments, at the threads of rope still clinging to his ankles - and wondered. He returned their stares vacantly.
"Come in," began Miss Cornelia. "Sit down." He obeyed both commands docilely enough.
"Are you better now?"
"Somewhat." His words still came very slowly. "Billy - you can go."
"I stay, please!" said Billy wistfully, making no movement to leave. His gesture toward the darkness of the corridor spoke louder than words.
Bailey watched him, suspicion dawning in his eyes. He could not account for the butler's inexplicable terror of being left alone.
"Anderson intimated that the Doctor had an accomplice in this house," he said, crossing to Billy and taking him by the arm. "Why isn't this the man?" Billy cringed away. "Please, no," he begged pitifully.
Bailey turned him around so that he faced the Hidden Room.
"Did you know that room was there?" he questioned, his doubts still unquieted. Billy shook his head.
"No."
"He couldn't have locked us in," said Miss Cornelia. "He was with us."
Bailey demurred, not to her remark itself, but to its implication of Billy's entire innocence.
"He may know who did it. Do you?"Billy still shook his head. Bailey remained unconvinced.
"Who did you see at the head of the small staircase?" he queried imperatively. "Now we're through with nonsense; I want the truth!"
Billy shivered.
"See face - that's all," he brought out at last. "Whose face?"
Again it was evident that Billy knew or thought he knew more than he was willing to tell. "Don't know," he said with obvious untruth, looking down at the floor.
"Never mind, Billy," cut in Miss Cornelia. To her mind questioning Billy was wasting time. She looked at the Unknown.
"Solve the mystery of this man and we may get at the facts," she said in accents of conviction.
As Bailey turned toward her questioningly, Billy attempted to steal silently out of the door, apparently preferring any fears that might lurk in the darkness of the corridor to a further grilling on the subject of whom or what he had seen on the alcove stairs. But Bailey caught the movement out of the tail of his eye.
"You stay here," he commanded. Billy stood frozen. Beresford raised the candle so that it cast its light full in the Unknown's face.
"This chap claims to have lost his memory," he said dubiously. "I suppose a blow on the head might do that, I don't know."
"I wish somebody would knock me on the head! I'd like to forget a few things!" moaned Lizzie, but the interruption went unregarded.
"Don't you even know your name?" queried Miss Cornelia of the Unknown. The Unknown shook his head with a slow, laborious gesture.
"Not - yet."
"Or where you came from?"
Once more the battered head made its movement of negation."Do you remember how you got in this house?" The Unknown made an effort.
"Yes - I - remember - that - all - right" he said, apparently undergoing an enormous strain in order to make himself speak at all. He put his hand to his head.
"My - head - aches - to - beat - the - band," he continued slowly.
Miss Cornelia was at a loss. If this were acting, it was at least fine acting.
"How did you happen to come to this house?" she persisted, her voice unconsciously tuning itself to the slow, laborious speech of the Unknown.
"Saw - the - lights."
Bailey broke in with a question.
"Where were you when you saw the lights?"
The Unknown wet his lips with his tongue, painfully.
"I - broke - out - of - the - garage," he said at length. This was unexpected. A general movement of interest ran over the group.
"How did you get there?" Beresford took his turn as questioner.
The Unknown shook his