Leo was so surprised by this unexpected sight that for the moment he stood still. Then he made up his mind to interview the pair. Mrs Gabriel and Pratt evidently understood one another, and the two of them together might probably tell him more about himself than one would do. Moreover, Leo was angry at the way in which Pratt had let him lie under the of being a thief when he could have lifted the disgrace from off his shoulders. Certainly Pratt could have done so only at the risk of incriminating himself, but at the time Leo was too much annoyed to think of this. He saw that there was some mystery, and thinking it might have to do with Mrs Gabriel's enmity towards himself, he interrupted what seemed to be a furious conversation by knocking at the window.  
Mrs Gabriel and Pratt turned in the direction where the sound came, she with a pale face, and Pratt with a levelled revolver which he took from his breast pocket. Leo might have been in danger of his life, but that he chanced to remember a which Pratt had taught him, in order to announce his coming while he was staying at The Nun's House. At the time Leo had thought this was only a freak of the old man's, but now that he knew who Pratt was, he saw that there was use in it, to Pratt if not to himself. At all events, he began to whistle.
 
Hardly had he got through the first few bars before Pratt's attitude relaxed, and he tossed the revolver on to the table. Mrs Gabriel still continued to look , but Pratt stepped towards the window and opened it coolly.
 
"I knew it was you," he said, pulling Leo into the room and shutting the window. "It is a lucky thing you remembered my signal, else I might have drilled a hole in you. You come at a happy moment." Here he stopped and looked suspiciously at the young man. "Have you that infernal Marton with you?" he asked, with a glance at the window and a movement towards the revolver.
 
"No, no," replied Leo, hastily. "I am all alone."
 
"That's a good thing," said Pratt, grimly. "I won't be taken alive, I promise you. But I knew you would not give me away. I said so to Mrs Gabriel. She said you would—speaking the worst of you as usual."
 
Leo was too much taken aback by the discovery that Pratt was in the castle to reply immediately. Moreover, the man was so cool and composed that he felt as though he were in the wrong. He tried to collect his thoughts, but before he could open his mouth Mrs Gabriel in her usual domineering tones.
 
"What are you doing here, Leo?" she asked. "How did you get on to the terrace? No one can get on without the key of the gate."
 
"I happen to have the key," said Leo, showing it. "You gave it to me yourself some years ago. When I left you I took it with me by mistake. It has come in useful to-night. You may thank your stars, both of you, that I did not bring Marton back with me. He left me at the foot of the hill with a story that you were ill, Mrs Gabriel."
 
"Leo," said Pratt in an agitated tone, "surely you would not have brought the man here to get me into trouble?"
 
"I did not know you were here," said Haverleigh, carelessly, for he was still angered at the man.
 
"I have been here ever since the night I fled from Raston's house. It was Adam who went on to London and cut the wire."
 
"And the letter in which you said you had stolen the cup?"
 
"I wrote that here and posted it to Adam that he might send it from London. Mrs Gabriel helped me to hide. No one knows that I am in this house save herself, and now you are a sharer in our secret."
 
"It must be difficult to keep your presence here a secret from the servants," said Leo, wondering how the man had forced Mrs Gabriel to help.
 
Here the lady herself . "It is not difficult at all," she said in her most offensive tones. "You know nothing of what you are talking about. Pratt is up in the tower room, and I take him food myself from my own meals. It is impossible that anyone can guess."
 
"Well, my dear aunt," said Haverleigh, emphatically, "I know that Pratt is here. I think, therefore, you had better behave towards me in a more civil manner."
 
"Ha!" Mrs Gabriel, folding her arms and looking . "You would not dare to state the truth."
 
"How do you know that?" said Leo, dryly. "Pratt is wanted by the law. He committed a theft here and allowed me to lie under suspicion. Why should I not give him up and accuse you of being an accessory to his ?"
 
Mrs Gabriel frowned and her black eyes flashed, but Pratt, who had taken a seat, did not move. He merely laughed. "I don't think you will give away, Leo," he said. "I admit that Mrs Gabriel is enough to irritate a saint; but if you punish her you punish me also."
 
"And you deserve punishment," retorted Leo.
 
"Probably I do; but I have my own opinion of the matter. All I ask you to do is to hold your tongue until such a time as I can get away."
 
"When are you going away?"
 
"Soon, I hope," cried Mrs Gabriel, spitefully. "I am rather tired of having a jail-bird in my house."
 
"Oh! you refer to that American affair," said Pratt, airily. "I had quite forgotten it. Well, my dear lady, I do not intend to burden you with my presence after to-morrow. By this time no one will be watching for me hereabouts, as I am supposed to be in London. I shall go to-morrow night and return to my London quarters, where Adam awaits me. By[202] the way, Haverleigh, has that fool of a detective gone?"
 
"He is going to-morrow," said Leo in a surly tone.
 
"All the better. We can travel to London together. Ah, you smile, my dear Leo, but I assure you that if I chose to travel with Marton I should do so. I can disguise myself so effectively that even he would not know me. It is not the first time I have baffled him."
 
"Look here, Mr Pratt, or whatever you choose to call yourself," said the young man, calmly, "you have been kind to me in your own way, and I do not want to take advantage of your present unfortunate position. At the same time, you are a thief and a criminal, and I want to have nothing to do with you. Mrs Gabriel may approve of your company, but I do not wish to have you for a friend. I shall hold my tongue, but I recommend you to leave this place as soon as possible."
 
Mrs Gabriel glared at Leo, as she could ill his references to herself. She half rose as though she would have flown at him, but a glance from Pratt her, and she sat down with more than could have been expected from such a termagant. Pratt, still keeping his temper, turned to Leo. "It is very good of you to interest yourself in my movements," he said in silky tones, "but I can look after myself. It is a grief, my dear fellow, a great grief, that I should be compelled to leave this neighbourhood. I like the place, and the people are fairly agreeable. I was nicely settled in The Nun's House, and—"
 
"Surrounded with stolen goods," interrupted Leo, wrathfully.
 
Pratt sighed. "I had some charming things," he said; "how I shall miss them! I am too old to make another such collection. I suppose they have all returned to the people I took them from, I fear the stupid creatures will not appreciate them as I have done."
 
Pratt's was so that Leo could not help laughing, but Mrs Gabriel rose in a black fury and shook her fist in the man's face. "How dare you boast of your in my house?" she cried.
 
"In your house, my dear lady?" Pratt, . Mrs Gabriel got very white and sat down again. Pratt had some power over her, which she was afraid he might use. Leo had never seen the woman so cowed.
 
"Well, well," continued Pratt, stretching his legs; "I have to go, thanks to that wretched man Marton. How was it he appeared so unexpectedly?"
 
"Raston sent for him to London to find out who committed the robbery."
 
"Ah!" Pratt laughed. "I hope Mr Marton is satisfied now. My letter should have pleased him."
 
"It pleased me more," said Leo, bluntly; "my name is now clear! And you will be glad to hear," he added, turning to Mrs Gabriel, "that Hale, in the presence of Marton and his sister, confessed that he lent me the money. I am afraid your plot against me has failed, my dear aunt."
 
"Hold your tongue!" said Mrs Gabriel, angrily.
 
"No. The time has passed for that. I am no longer in your power. I intend to make my own way in the world."
 
"With assistance from Mrs Gabriel," said Pratt, quietly. "She will start you with a thousand pounds, my dear Leo."
 
"I won't give one penny," said Mrs Gabriel, glaring. "You can do your very worst, Pratt. I have been your milch cow long enough."
 
"I would not take anything from her," said Leo, interposing; "and I'll thank you, Mr Pratt, to leave my affairs alone. If you will persist in with them, I shall not keep my promise of silence."
 
"Oh, yes, you will!" chimed in Pratt, fixing him with his eye. "You dare not betray me, Leo."
 
"Dare not!" echoed the young man, angrily.
 
"Not unless you want to be called an son, my boy!" Leo stared, not taking in the meaning of this speech. "For you are my son, Leo," added Pratt in low tones, his eyes never leaving Haverleigh's face.
 
"Your—your—Great Heavens!"
 
Mrs Gabriel burst into a laugh. "Ah, you know it at last!" she cried . "And he has told you after threatening me with all sorts of things to keep me silent."
 
"It's—it's not true!" Leo.
 
"It is true," said the woman, . "You are the son of the cleverest thief in the three kingdoms."
 
"Hold your tongue, you hag!" shouted Pratt, angrily, for Leo was as white as ashes and his face wore an expression of terrible agony.
 
"I won't be quiet. You told him yourself, and now he shall know all—as the vicar does," finished Mrs Gabriel, laughing fiercely.
 
Leo started to his feet. "Sybil!" he cried out, staring at his enemy. "I know now why the vicar will not let me marry her. You—you—"
 
"Told him you were an illegitimate son," said Mrs Gabriel, rapidly. "I did not say who was your father, but now that Pratt's true character is known I shall tell Tempest everything. Then we shall see if he will let you speak to Sybil again."
 
"You dare say a word, Mrs Gabriel, and I—"
 
But the woman was not to be stopped. She turned like a fury on Pratt, who had risen angrily. "Hold your tongue," she said ; "I have had about enough of you and your precious son. You made me take him to my home and tell everyone that he was the son of my dead brother. A lie, as you well know. And you," she added, turning on Haverleigh, "you know now why I have hated you all these years. That man knows a secret of mine and he forced me to do his bidding. I took you he............