In 1992, my book 'Haunted Clwyd' included a story from Gwernymynydd, in Flintshire. Ty Gwernen, a lovely old house on the hillside overlooking Mold, was lovingly restored by Dave and Ann Johnson and is still their home, although their three sons Daniel, Matthew and Edward have now found homes of their own.
In 1990 the boys were all in their teens. Matthew told me that one evening he had been frightened by the sight of 'a horrible face' peering in through his bedroom window. He said it was 'very wrinkled, ugly and, in my frightened state it also looked very evil'.
Coincidentally, a few hours after telling of his experience, he went home to discover younger brother Edward in a state of shock after seeing a ghost. Matt phoned me up from Ty Gwernen that night and put Ed on to me.
Ed told me: 'I was on my own in the house watching television in the sitting room when suddenly this old woman walked into the room. She was very old and white haired, with a thin face. She walked into the middle of the room and stood in front of the fire, staring at the wall.
'It was terrifying, she was just a few feet in ront of me. But she didn't seem to be aware of me at all. After a few monents, she slowly disappeared. I've spent the rest of the night hiding in the kitchen!'
Eldest brother Daniel admitted to hearing mysterious tappings and scratchings in an upstairs room but had never seen a ghost. Neither had Dave or Ann, who naturally played the incident down and assumed an air of healthy scepticism.
Seventeen years later, however, and the ghost has been seen again - this time by Dave. When Matthew got married on November 17 (to the lovely Emma), the whole family came home and Dave wasted no time in telling me that his own doubts of the ghost of Ty Gwernen had been dispelled by the 'seeing is believing' rule.
Dave told me that earlier in the year, he had been repairing a set of glass sliding doors overlooking the garden and which filled the original entrance to the building. He had been steadily, quietly working away for a while but then looked up to glimpse an elderly lady watching him. She seems to have been the same figure seen by Edward back in 1992. She too vanished on being spotted.
'I think she was just seeing what I was up to,' said Dave. 'Making sure she was happy with what I was doing to her old home.'
It is true that building work often brings ghosts 'out of the woodwork'!
(The picture reproduced here from 'Haunted Clwyd' shows Matthew and Edward standing outside Ty Gwernen - at the very spot where their father Dave saw the ghost this year. 'Haunted Clwyd' is still in print and published by Gwasg Carreg Gwalch).