"The lady who was present at the murder of Jackson?"

"There is no reason why we should not take you into our confidence, the more so since the necessity for secrecy is rapidly passing. Miss Oliva Cresswell is the niece of John Millinborn. Her mother married a scamp who called himself Cresswell but whose real name was Prédeaux. He first spent every penny she had and then left her and her infant child."

"Prédeaux!" cried the detective. "Why you told me that was Jackson's real name."

"Jackson, or Prédeaux, was her father," said Kitson, "it was believed that he was dead; but after John Millinborn's death I set inquiries on foot and discovered that he had been serving a life sentence in Cayenne and had been released when the French President proclaimed a general amnesty at the close of the war. He was evidently on his way to see John Millinborn the day my unhappy friend was murdered, and it was the recognition of his daughter in the palm-court of the Grand Alliance which produced a fainting-fit to which he was subject."

"But how could he recognize the daughter? Had he seen her before?"

For answer Kitson took from his pocket a leather folder and opened it. There were two photographs. One of a beautiful woman in the fashion of 25 years before; and one a snapshot of a girl in a modern costume, whom McNorton had no difficulty in recognizing as Oliva Cresswell.

"Yes," he said, "they might be the same person."

"That's the mother on the left," explained Kitson, "the resemblance is remarkable. When Jackson saw the girl he called her Mary—that was his wife's name. Millinborn left the whole of his fortune to Miss Cresswell, but he placed upon me a solemn charge that she was not to benefit or to know of her inheritance until she was married. He had a horror of fortune-hunters. This was the secret which van Heerden surprised—I fear with violence—from poor John as he lay dying. Since then he has been plotting to marry the girl. To do him justice, I believe that the cold-blooded hound has no other wish than to secure her money. His acquaintance with White, who is on the verge of ruin, enabled him to get to know the girl. He persuaded her to come here and a flat was found for her. Partly," said the lawyer dryly, "because this block of flats happens to be her own property and the lady who is supposed to be the landlady is a nominee of mine."

"And I suppose that explains Mr. Beale," smiled the inspector.

"That explains Mr. Beale," said Kitson, "whom I brought from New York especially to shadow van Heerden and to protect the girl. In the course of investigations Mr. Beale has made another discovery, the particulars of which I do not know."