From about 1978-1983 Usborne seem to have a had a merry old time producing rather creepy children's books. Haunted Houses was probably my favourite, it never went up in the attic and has always moved house with me. I must have been 6 or 7 when it was bought, and there's always been something unique about the illustrations and text, the same matter-of-fact style of drawing/writing that you'd get from a book on wildlife applied to a headless woman.
There's no 'we believe' or 'possibly' about it, she 'haunts a marsh on the west coast of England at dusk'. Fantastic.