sentences:  In the "Life of St. Columba" it is recorded that he visited King Bridei in Pictland in around the year 565 AD and, taking a white stone pebble from the River Ness, he blessed it and any water it came into contact with would cure sick people.It floated in water and cured the king from a terminal illness.It remained as one of the great treasures of the king and cured many others.