The white horse of Zennor and other stories - Michael Morpurgo

At the furthest edge of Britain, where the sea gently washes over the land and myths brush against reality, lies Zennor. Since the beginning of time strange and mysterious things have happened there, and these stories highlight all the most haunting and enchanting events.
Once a year, on a misty autumn night, there is a pounding of hoof beats as a great white horse comes thundering over the moor in the moonlight. Then there are the old tin miners that Cherry meets when she is cut off by the incoming tide, as well as limping Billy who learns to swim with the seals. The proud Thomas Barbery and the intriguing Mad Miss Marney also add their own stories to this unforgettable collection.