In a few cases[59] hexagonal figures occur in the decoration of the urns, but the patterns do not belong to the true hexagonal system of ornament. The hexagons were arrived at by leaving a space between the triangles of the chevrons, as on a drinking-cup found at Rhosbeirio,[60] Anglesey. [59] Ll. Jewitt’s _Grave-Mounds and their Contents_, p. 108. Folkton, Yorkshire. [60] _Archæologia Cambrensis_, 3rd ser., vol. xiv., p. 271; _British Barrows_, p. 70. The decoration of the urns is generally confined to the exterior, the only exceptions being the interiors of the lips of some of the examples and the crosses in relief found on the bottoms inside of cinerary urns from Wilts, Dorset, and Sussex. The incense-cups have occasionally ornament on the bottoms of them which, like the crosses just mentioned, may have a symbolical significance. Some of the urns from Ireland, Scotland, and the Isle of Man, are very beautifully decorated with sunk triangles and ovals. The different types of urns are not all equally highly ornamented. The large flower-pot-shaped cinerary urns have least decoration, being sometimes quite plain, but in the majority of cases having a broad band of ornament round the top. The drinking-cups are more elaborately decorated than any other class of sepulchral pottery, although the food-vessels are also nearly as ornate. The artistic quality of the decoration varies in different parts of Great Britain. Some of the most beautiful examples come from localities where there was a great mixture of aboriginal blood with that of the Celtic invaders, and it is not unlikely that the infusion of new blood may have had something to do with the excellence of the art. The chevron, although it was more highly developed as a decorative art-motive in the Bronze Age than at any other period, was not unknown to the Neolithic inhabitants of Great Britain, and it is more than probable that the Goidelic Celts got the idea from them. Several shallow vessels with a band of chevron ornament round the rim were found in the chambered cairn at Unstan,[61] Orkney, which is of the later Stone Age. This particular chevron pattern occurs frequently in the Bronze Age. Each of the triangles formed by the chevron is filled in with hatched lines running diagonally, but alternately in directions at right angles to each other (Fig. 4, _d_, p. 30). The pattern had no doubt a structural origin, and was suggested by lashing of the description used for the hafting of stone axes, or by some similar bandaging of cords.[62] [61] Dr. J. Anderson’s _Scotland in Pagan Times: Bronze and Stone Ages_, p. 294. [62] Prof. A. C. Haddon’s _Evolution in Art_, p. 87. A similar chevron pattern is to be seen on a bowl from the Dolmen du Port-Blanc, Saint Pierre, Quiberon, Morbihan, Brittany.[63] Possibly this may be the survival of a strengthening band of basketwork round the vessel. [63] Paul du Chatellier’s _La Poterie aux Époques préhistorique et Gauloise_, pl. 12, fig. 12.