The Hand in the Dark by Arthur John Rees

Excerpt:
Seen in the sad glamour of an English twilight, the old moat-house, emerging from the thin mists which veiled the green flats in which it stood, conveyed the impression of a habitation falling into senility, tired with centuries of existence. Houses grow old like the race of men; the process is not less inevitable, though slower; in both, decay is hastened by events as well as by the passage of Time.

The moat-house was not so old as English country-houses go, but it had aged quickly because of its past. There was a weird and bloody history attached to the place: an historical record of murders and stabbings and quarrels dating back to Saxon days, when a castle had stood on the spot, and every inch of the flat land had been drenched in the blood of serfs fighting under a Saxon tyrant against a Norman tyrant for the sacred catchword of Liberty.