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98 Wooston and Prestonbury on the Teign, Holne and Hembury on the Dart. Along the south of the moor are none till we reach Boringdon, between the Plym and the Tory. But one only of all these has been systematically explored, and that is, perhaps, the finest, on Whit Tor, above Mary and Peter Tavy.

Whit Tor rises to the height of 1,526 feet above the sea-level. It is on Cudlipptown Down, and commands exceedingly fine views westward as far as the distant Cornish hills.

The tor is not of granite, but of gabbro, an eruptive igneous rock, very black and hard, and splitting along defined planes under the action of the weather. The north side near the summit is covered with a clitter of broken masses.

The boldest masses of rock rise on the south precipitously, but there are fangs of rock that shoot up over the small plateau that forms the summit of the hill.

The whole of the summit is surrounded by a double wall in a very ruinous condition, and this is to a considerable extent due to the smallness of the stones of which it was composed. The faces of the walls were to be traced only by digging, and were never more than doubtful.

Both walls appear to have been 10 feet thick, perhaps a little more; the outer, when perfect, might have had a height of 4 to 4½ feet, whilst the inner, judged by the debris, appears to have been 6 to 7 feet high.

The space between the walls varied, owing to the