Page:A book of the west; being an introduction to Devon and Cornwall.djvu/232

174 passage which will explain why some cairns contain no interments:—

Sometimes, after a battle, when it was not possible to carry away a body, the head of the man who had fallen was buried by his friends under a cairn, because the ancient Irish were wont to carry off heads as trophies; but to violate a cairn, even when raised by a foe, was regarded as sacrilege.

On Dartmoor, in addition to prehistoric antiquities, numerous rude stone crosses remain; some of these, if not all, indicate ways, and were employed as landmarks. Only one bears an inscription, "Crux Siwardi."

The whole of the moor, in the stream bottoms, is seamed with streamers' "burrows" and deep workings. It is not possible to fix their date. Throughout the Middle Ages stream tin was extracted from Dartmoor. Fresh activity was shown in the reign of Elizabeth. Beside the mounds may be seen the ruins of the old "blow-house," where the tin was smelted, and very probably among the ruins will be found the moulds into which the tin was run. I