Beware of the Dog.
It’s said that whoever moves the standing stone near the village of Murthly in Perthshire will find a chest guarded by a black dog. The stone in the legend is probably the large prehistoric monument in the grounds of Murthly Castle. Thousands of years later in the mid-9th century, someone carved a person being chased by a large beast onto a sandstone slab, which was found near the village in 1886.