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 The great central causeway crossed the modern road near the Dissenting chapel, and may be traced in the marsh aiming for the river, beyond which it ascends the hill and strikes along the brow behind Archerton. It is paved, and is a continuation of the old Fosse Way. It is certainly not Roman work, but British.

Post Bridge has been termed, not accurately, a prehistoric metropolis of the moor. This is because round the ancient lake-bed were numerous pounds containing hut circles. Most of these have now been destroyed, yet one remains perfect—Broadun; and adjoining it is Broadun Ring, where the outer circle of the inclosure has been pulled down, but a considerable number of the huts has been spared. There remain indications of fifteen of these inclosures. More have certainly been destroyed.

Lake-head Hill has been almost denuded of the monuments that once crowded it. They were systematically removed by the farmer at Bellever. Happily one kistvaen has been left on the summit, and there are two or three others, small and ruinous, on the sides.

The "cyclopean bridge" over the Dart is composed of rude masses of granite maintained in position by their own weight. It was the old packhorse bridge.

There are other bridges of the same description; one is on the stream at Bellever, one under Bairdown. But a structure of this sort is the simplest and most easily reared on Dartmoor, where lime is not found, and has to be brought at great expense from a distance.