Prain looked up with a grave expression on his face. "It is a paradox which I can explain," he said shortly. "Ferris does know Dean."

"He does know Dean!" cried both his hearers in amazement.

"Yes! I may as well tell you both, that Arthur Ferris is the son of Marmaduke Dean."

[CHAPTER XV]

THE REVELATION OF MR. PRAIN

"Arthur Ferris the son of Dean!" repeated Gebb, looking alternately at solicitor and barrister. "Well, I never heard of such a thing. Did you know of it, Mr. Alder?"

Alder shook his head with unqualified amazement. "Not I!" he said. "I suggested that Ferris was shielding Dean, only because I am certain Dean is the assassin; and only the assassin could have given that necklace taken from the dead woman to Ferris, but I had no idea that there was any relationship or even acquaintance between them."

"Nevertheless it is true," replied Prain, with a nod. "I was Dean's lawyer, as you know, and he told me much of his family history. When his wife died, he placed his son Arthur with some of her relatives, and went himself as a bachelor down to the Hall, to court Laura Kirkstone for his second wife and meet with his fate. When he was imprisoned for the murder of Kirkstone, the relatives of Arthur gave him his mother's name of Ferris. I have kept my eye on that young man all my life--or, rather, all his life of twenty-five years, and have even assisted him on occasions with money. He is the son of Dean right enough, although he still keeps to the name of Ferris."

"Oh! he knows who he is, then?" said Gebb, sharply.

"Certainly! He has known it for many years."