was a clever actor. "You are a handsome young woman," he said slowly, when she had finished, "but I begin to be afraid that your mind is unfortunately--er--affected."
"There is a weight upon it," Joan replied.--"the weight of your secret. It's so heavy that unless you are very kind, I shall be tempted to throw the burden off by laying it upon others."
Now the blood hummed in her ears. If she had built a house of cards, this was the moment when it would topple, and bury her ambition in its ignominious downfall. But Lord Northmuir's slow speech had quickened her hope, for she said to herself that it was not spontaneous; and gazing keenly into his face, she saw the blood stain his forehead. She had staked on the right chance, yet the risk was not past. Her game was the game of bluff, but its success depended upon the man with whom she had to deal.
"I do not understand what you are talking about," he said.
"I dare say I haven't made my meaning clear," answered Joan, half rising. "Perhaps I'd better explain to my solicitor, and get him to write a letter----"
"You are nothing more nor less than a common blackmailer," Lord Northmuir exclaimed, bringing down his white hand on the arm of his chair.
"I may be nothing less, but I am a good deal more than a common one," retorted Joan, surer of her ground. "I will prove that, if you force me to do it."
"Who are you?" he broke out abruptly.
"I am a Woman Who Knows," she replied. "There was another Woman Who Knew. She called herself Gone. She is dead, and I have come. I have come to stay."
"Don't you understand that I can hand you over to the police?" demanded Lord Northmuir, with difficulty controlling his voice so that it could not be heard by possible listeners outside the door.
"Yes; and I understand that I can hand your secret over to the police. They would know how to use it."
He flushed again, and Joan saw that her daring shot had told. For the instant he had no answer ready, and she seized the opportunity to speak once more. "You can do better for yourself than hand me over to the police. There need be no trouble, if you will realise that I am not a common person, and not to be treated as such."
"Again I ask: Who are you?" he cried.
Joan risked another shot in the dark. "Can't you make a guess?" she asked, with a malicious suggestion of hidden meaning in her tone.
An expression of horror and surprise passed over Lord Northmuir's handsome face, devastating it as a marching tornado devastates a landscape. It was evident that he had "made a guess," and been thunderstruck by its answer. Joan's curiosity was so strongly roused that it touched physical pain. Almost, she would have been ready to give one of her pretty fingers to know the secret.
"Do you still wish to ask questions?" she inquired.
"Heaven help me, no! What is it that you want?"
"I have told you already. If I insisted on all I have a right to claim, you would not be where you are."
She watched him. He grew deathly and bowed his white head. Joan felt sorry for the man now that he was at her mercy; but her imagination played with the secret, as a child plays with a prism in the sunshine. Its flashing colours allured her. "Oh! if I only knew something," she thought, "something which would hold in law, and could go through the courts, where might I not stand? I might reach one of the highest places a woman can fill. But it's no use; I must take what I can get, and be thankful; and, anyway, I can't help pitying him a little, though I'm sure he doesn't deserve it. He's old and tired, and I won't make him suffer more than is necessary for the game."
Joan again named her terms, this time with much ornamental detail. She was to be a newly discovered orphan cousin. Her name was to be, as it had been in Cornwall, Mercy Milton. She was to be invited to visit, for an indefinite length of time, at Northmuir House. Her noble relative was to exert himself to the extent of giving entertainments to introduce her to his most influential and highly placed friends. He was also to make her an allowance of a thousand pounds a year.
"Don't think, if you gamble away as--as the other did, that I will go beyond this bargain, for I will not!" cried Lord Northmuir, with a testy desire to assert himself and show that he was not wholly to be cowed.
"I don't gamble, except with Fate," said Joan.
This exclamation of his explained one or two things which had been dark. She guessed now why Mrs. Gone, evidently used to luxuries, had been reduced to living on the charity of a boarding-house keeper, and why it had been necessary to wait until she should be well enough to go out before she could obtain "remittances."
Having concluded her arrangement with Lord Northmuir, and settled to become his relative and guest, Joan went back in her brougham to Woburn Place. She told Miss Witt that she had been called away, packed her things, left such as she would not want in Belgrave Square in boxes at the boarding-house, delighted the housekeeper with many gifts, and the following morning drove off with a pile of luggage on a cab. Turning the corner of Woburn Place into the next street, she also turned a corner in her career, and for the third time ceased to be Joan Carthew.
She had chosen to take up her lately laid down part of Mercy Milton for two reasons. One was, that in this character as she had played it in Cornwall, with meekly parted hair, soft, downcast eyes, simple manners and simple frocks, she was not likely to be recognised by any one who had known the dashing and magnificent Miss Jenny Mordaunt; while if she should come across Cornish acquaintances, there was nothing in her new position which need invalidate the story of Lady Pendered's gentle sister.
If Lord Northmuir had looked forward with dread to the intrusion of the adventuress whom he was forced to receive, he soon found that, beyond the galling knowledge of his bondage, he had nothing disagreeable to fear. The young cousin did not attempt to interfere with his habits after he had provided her with acquaintances, who increased after the manner of a "snowball" stamp competition. The two usually lunched and dined together, and--at first--that was all. But Miss Mercy Milton made herself charming at table, never referred by word or look to the loathed secret, and was so tactful that, to his extreme surprise, almost horror, the man found himself looking forward to the hours of meeting. Joan was not slow to see this; indeed, she had been working up to it. When the right time came, she volunteered to help Lord Northmuir with his letters (he had no secretary) and to read aloud. At the end of six months she had become indispensable, and he would have wondered how existence had been possible without his treasure had he dwelt upon the dangerous subject at all. If, however, the blackmailer's instalment in the household had turned out an agreeable disappointment to the blackmailed, it was a disappointment of another kind to the author of the plot. Joan Carthew did not find life in Belgrave Square half as amusing as she had pictured it, and though she was surrounded by luxury which might be hers as long as Lord Northmuir lived, each day she grew more restless and discontented.
She had found society on the Riviera delightful, but the butterfly crowd which fluttered between Nice and Monte Carlo had little resemblance to that with which she came in contact as Lord Northmuir's cousin. Jenny Mordaunt could do much as she pleased--at worst she was put down as a "mad American, my dear"; but Mercy Milton had the family dignity to live up to. Lord Northmuir's adopted relative could not afford to be "cut" by the primmest dowager; and being an ideal, conventional English girl in the best society did not suit Joan's roaming fancies.
It was supposed that she would be Lord Northmuir's heiress; consequently mothers of eligible young men were charming to her, which would have been convenient if Joan had happened to want one of their sons. But not one of the men who sent her flowers and begged for "extras" at dances would she have married if he had been the last existing specimen of his sex. This was annoying, for in planning her campaign, Joan had resolved to marry well and settle satisfactorily for life. Now, however, she found that it was simpler to decide upon a mercenary marriage in the abstract than when it became a personal question.
At the close of a year with Lord Northmuir she had saved seven hundred pounds, and at last, after a sleepless night, she made up her mind to take a step which was, in a way, a confession of failure.
She went to Lord Northmuir's study