An intrepid photographer went to a haunted castle determined to get a picture of a ghost which was said to appear only once in a hundred years.

Not wanting to frighten off the ghost, the photographer sat in the dark until midnight when the apparition became visible.

The ghost turned out to be friendly and consented to pose for one snapshot. The happy photographer popped a bulb into his camera and took the picture.

After dashing into his studio, the photographer developed the negative and groaned. It was underexposed and completely blank.

Moral: The spirit was willing, but the flash was weak.