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. IX. of a horse-shoe form, like the Countless Stones at Aylesford, and measures 13 feet by 10 feet internally. Originally it was roofed by a single stone, measuring 19 feet by 15 feet, but which is now, unfortunately, broken. The side-stones and roof are closely fitted to one another, showing that it was always intended to be, and, in fact, is now, partially covered by a mound of earth.

At Cangas de Onis, in the Asturias, about forty miles east from Oviedo, there is a small church built on a mound which contains in it a dolmen of rather unusual shape. Its inner end is circular in plan, from which proceeds a funnel-shaped nave, formed of three stones on each side, and with a doorway formed by two large stones at right angles to its direction. On the top of the mound a church was built, probably in the tenth or eleventh century, to which this dolmen served as a crypt. From this it seems to be a fair inference that, when the church was built on the mound, the dolmen was still a sacred edifice of the aborigines. Had the Christians merely wanted a foundation for their building, they would have filled up or destroyed the pagan edifice, but it seems to have remained open to the present day; and though it has long ceased to be used for any sacred purpose, it still is, and always was, an essential part of the church which it supported.

A still more remarkable instance of the same kind is to be found at a place called Arrichinaga, about twenty-five miles from Bilboa, in the province of Biscay. In the hermitage of St. Michael,