The hole or eye of the nether stone was for the purpose of receiving a conical plug, the apex of which penetrated partly into the eye of the upper stone, and served the double purpose of keeping the runner stone in position and of distributing the feed equally on the grinding-surfaces. To further assist this are four curved master-furrows or grooves, radiating from the eye of the grinding-surface of the upper stone. The mill, worked by men or by horses, was of slow speed, and water was introduced to assist the propulsion of the ground material towards the grooved lip in the periphery of the stone. This and the feed were, of course, introduced through the circular hole in the top stone. On the site of what was evidently the blowing-house is a mould-stone, about 4 feet by 3. The mould is 15 inches long by 11 inches wide at one end, and 10 inches at the other, and 4 to 5 inches deep. There are also cavities for sample ingots. Other stones lie about with hollows worked in them, that seem to have been mortar-stones, used for pounding up the ore, at a period earlier than that at which the crazing-mill was introduced. Further up the Swincombe, on the left, a little stream descends that has had its bed turned over and over. This is Deep Swincombe, and here are the remains of the earliest known smelting-house yet noticed on Dartmoor. It has been fully described in a previous chapter. On all sides we discover traces of those who in ancient times came to Dartmoor and toiled after metal. We go in swarms there now--to spend our metal and idle and gain health. So the old order changeth, and with it men's moods and manners. To return to Holne. In the parsonage Charles Kingsley was born, but the house has since been to a large extent rebuilt. On a fly-sheet of the Book of Burial Registers is the entry, "The Vicarage House, being very _dilapidated_, was taken down and rebuilt by the Vicar (the Rev. John D. Parham) in the year 1832." It was in that "very dilapidated" house that Charles Kingsley was born. A curious custom existed at Holne, now given up. There is, near the village, a "Ploy (play) Field" in which stood formerly a rude granite stone six or seven feet high.