Bitterley Churchyard Cross has a circular hole through its shaft at a convenient height for sighting. Mr. J. C. Mackay kindly had the exact direction of this taken for me by sighting compass. It is 28½° E. of Magnetic N., and this on the map exactly strikes Abdon Burf (or Barf), the high point (1,790ft.) of the Brown Clee. Southwards the line runs through Stoke Prior and Hope-under-Dinmore Churches, is confirmed in other ways, and goes over the Wye at Belmont House. Bitterley Cross is of 14th century date; it must be the successor of a sighting stone which in some way pointed the direction of the ley, and it suggests that sighting along a ley had not quite died out by the 14th century. These two proved instances of sighting stones, together with the cases of stone rows on Dartmoor, and sighting columns on Sutton Walls, will give the clue to the hitherto unknown purpose of many important ancient stone monuments. It is probable that the flat face of a mark stone, as in Wergin’s Stone (Plate X.), pointed out a ley. There is a Dial Post near Tewkesbury which, with the Dial Carreg near Cwm-yoy, seems to denote the above purpose, and the last stone is an upright shaft of rectilinear shape like the supposed cross at Capel-y-fin (Plate X.). [Illustration: PLATE VII. CAUSEWAYS. 1. Over Olchon Brook, Longtown. 2. To Centre of Pond, Ingestow, Ross.] [Illustration: PLATE VIII. LEYS DISPLAYED. 1. Track Climbing Ridge, Llanthony Abbey. 2. Straight Wye-side Causeway, Bartonsham, Hereford.] TREES. I find that practically all the named historic trees (including Gospel Oaks) stand on leys. Such as King’s Acre Elm, Eastwood Oak, Great Oak at Eardisley, Oak near Moreton-on-Lugg Bridge, etc. Place names (which in my previous articles on Crosses I too hastily held to signify the site of a cross) also indicate trees as marks. Such are Lyde Cross Tree, Cross of the Tree at Deerfold, Cross Oak, Cross Ash, Cross Colloe (hazel tree cross), and two leys cross at these points. Actual trees are shown at the cross roads in two of the above in Taylor’s fine county map of 1757. The Oak in the horse-shoe meadow at Ross is on the ley passing over Over Ross (the place name indicates it) and Wilton Castle. The steep little street coming down to the river from the Swan Hotel is dead on this ley. Where a natural hill came under a ley it was often made a sighting point by the planting of a single tree, hence the numerous “one tree” hills, as at Backbury and on the Holmer Golf Links. All places called “The Grove” seem to be on a ley, and a small group of trees (as at Ladylift) was also used to mark a sighting point. Existing trees are probably successors of original ones.