Another equally fine site is that of Bou Merzoug, near Oulad Rahmoun, about an hour's railway journey from Constantine. The place is naturally adapted for a settlement as there is a spring of water there. This spring was later utilized by the Romans to provide water for the city of Cirta. The dolmen-graves lie in great numbers on the hill at the foot of which the spring rises, and extend down into the valley. Each dolmen lies in the centre of a stone circle. This last is in some cases formed by very large slabs set on edge, but more often by two or three courses of rough oblong blocks. Many of the graves are badly damaged. One of the finest had an outer circle about 27 feet in diameter, and an inner circle 14 feet in diameter. Between these two a third circle, much more irregular and of small stones, could just be distinguished. But in most cases it was impossible to make out clearly more than the one outer circle and the dolmen within it. The dolmen itself consisted of a large slab resting on walls formed of several large blocks, the spaces between which were filled up with smaller stones. None of the stones used were worked. The dolmens were not oriented according to any fixed system. M. Feraud states that the separate graves were united together by open corridors formed by double or triple rows of large stones, but no traces of such a system could be found by the later visitors to the site, Messrs. MacIver and Wilkin. Fortunately we have some record of what these graves contained, for thirteen were opened by Mr. Christy and M. Feraud. One contained a human skeleton in good condition, buried in the contracted position with the knees to chin and arms crossed. With this were two whole vases, fragments of others, and pieces of cedar wood. At the feet of the skeleton were two human heads, and as the graves would not have accommodated more than one whole body M. Feraud suggests that these belong to decapitated victims. Another grave contained, in addition to human bones, those of a horse, together with three objects of copper, viz. a ring, an earring, and a buckle. In another were found the teeth and bones of a horse and an iron bit.