They said no more on the subject till after dinner, when they were
ensconced in Sir Nathaniel's study, which was on the top storey. Doom
Tower was a lofty structure, situated on an eminence high up in the Peak.
The top commanded a wide prospect, ranging from the hills above the
Ribble to the near side of the Brow, which marked the northern bound of
ancient Mercia. It was of the early Norman period, less than a century
younger than Castra Regis. The windows of the study were barred and
locked, and heavy dark curtains closed them in. When this was done not a
gleam of light from the tower could be seen from outside.

When they were alone, Sir Nathaniel explained that he had taken his old
friend, Mr. Salton, into full confidence, and that in future all would
work together.

"It is important for you to be extremely careful. In spite of the fact
that our marriage was kept secret, as also your temporary absence, both
are known."

"How? To whom?"

"How, I know not; but I am beginning to have an idea."

"To her?" asked Adam, in momentary consternation.

Sir Nathaniel shivered perceptibly.

"The White Worm--yes!"

Adam noticed that from now on, his friend never spoke of Lady Arabella