Catherine had married him nine years earlier.

She came from a county farther east and had once written letters every week to her younger sister, Margaret Vale.

After Margaret died, Catherine stopped answering questions about her old family.

She spent long afternoons at a dressing table, ran household accounts with nervous precision, and asked servants to leave rooms before she made ordinary telephone-like announcements through the speaking tube newly installed by the colonel’s craftsmen.

There was no such instrument in the house, only a system of bell pulls and hand-carried instructions, yet Catherine spoke as if a command could erase the distance between desire and obedience.

Daniel had known her as a demanding mistress whose moods changed with the weather.

She had not previously cornered him alone.

That change began after he was assigned the walnut trunk repair.

Richard had insisted Daniel work after dark, then watched from the doorway as the carpenter removed the damaged bottom.

“You will replace the panel exactly as it was,” he said.

“You will not mention what you see.”

Daniel saw sealed envelopes, a list of names, and a page stained by water.

He also saw his mother’s name.

Ruth Carter appeared in a column beneath a heading about transfers.

The colonel covered the page before Daniel could read the date.

For the next three months, Daniel held that moment in memory like a nail hidden beneath his tongue.

His chance to ask more came when Catherine summoned him upstairs.

He had entered expecting another threat.

He found a second person who might be imprisoned by the same papers, although not in the same way.

Chapter 3: The Blue Thread

Catherine untied the blue thread with fingers that had once moved through embroidery hoops without hesitation.

The first letter had come from Margaret in the autumn of 1851.

Its paper was soft and pale, bearing the small embossed crest of the Vale family.

Catherine recognized the handwriting immediately.

She pressed one hand to her mouth.

Daniel stood where he could see both the corridor and the top of the staircase.

He knew the housekeeper made her rounds shortly after nine.

He also knew the colonel’s guests were expected before ten.

That gave them a narrow window, provided neither of them made a sound.

Margaret’s letter began with an apology for her previous accusations.

Then it described a locked room at a property Richard managed west of Richmond.

Margaret claimed she had found two children there whose names were absent from the household records.