In studying such crosses, I was puzzled to find several (as at Vowchurch, Hentland, Capel-y-fin) with ancient rough unworked stones as a base. I am now certain that these bases are the original stones marking a ley. The Pedlar’s Cross near Pen-y-lan Farm above Llanigon (mentioned in Miss Jacob’s fine story, “The Sheep Stealers”) has been chipped into a rude suggestion of a cross without taking down, and a flat mark stone on which Archbishop Baldwin is said (by tradition) to have preached when on his tour with Giraldus in 1188, has had a cross inscribed on it. It stands close to St. Ishaw’s Well at Partricio. There is a striking marking stone on the Rhiw Wen route in the Black Mountains. Other stones on leys are:--White Stone, Withington (with original stone at the base of an inverted fragment of its successor--a wayside cross); Queen Stone, Huntsham, at Credenhill cross-roads, at the foot of Froom’s Hill, on the road near Turnaston Church, marking a ford at Bartonsham Farm, Hereford, and Crossways, Bollingham. The stone that all the Kings of England are crowned on is certainly a mark stone. SIGHTING STONES. Mark stones may be on one side of the track, as are the whitewashed stones which mark a coastguard’s cliff walk to-day. But there also appear to have been sighting points of stone exactly on the ley, so constructed as to indicate its direction. The Four Stones near Harpton, New Radnor, are four upright boulders (see Frontispiece) in an irregular quadrangle, and no one has explained their purpose. I took sighting lines over successive pairs of stones, five lines being possible, and although the work on the map is not yet completed, I can definitely say that the “Four Stones” are directing posts which point out at least two leys, proved by passing through other good points. The first goes to the highest point in Deerfold Forest (The Camp, 940ft.) in one direction, and in the other through The Folly and on the main road at Llanvihangel-nant-Melan, over Bryn-y-Maen Hill, here appearing to strike another “four stones,” and through Llansaintfraed in Elvel Church to some peak beyond. The second ley starts from Bach Hill (one of the highest parts of the Radnor Forest); through the Four Stones, dead on main road through Walton village, dead on main road past Eccles Green, through Upperton Farm and Kenchester Church, and dead on the present road which is the S.W. boundary of the Roman station of Magna; then going over the Wye through Breinton Church.