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Rh therefore, the word avenues can hardly be called appropriate to rows of stones leading from nowhere to no place, and between which there is no evidence that anybody ever was intended to walk, still it seems the least objectionable expression that has yet been hit upon, and as such it will be used throughout.

These avenues are of two classes. First, those leading to circles. About the origin of this class there can be very little hesitation. They represent externally the passages in tumuli which lead to the central chamber; take, for instance, this example from a now destroyed tumulus near St. Helier, in Jersey. The circular chamber was 24 feet in diameter, and contained originally seven little cells, each roofed by a single slab of stone. This circular area was approached by an avenue, 17 feet long at the time of its destruction, which was roofed throughout the whole length with slabs of stone. The central chamber never, however, appears to have been vaulted, so that access to the tombs through this passage could never have been possible after the mound was finished. The chamber was found filled with earth, and the whole monument covered up by a tumulus of considerable extent. It need hardly be observed that it is more unlikely that any people should cover up such a monument at any subsequent age, than that they