In the district around the valley of the West Webburn stream which cuts north-south through eastern Dartmoor, Grimspound seems to attract most attention. I have found no reference to the old field boundaries and terraces which lie in this district, mostly within the western part of the parish of Manaton. This article deals with fields within, or adjacent to, the Manaton parish boundary, but there are also sets of terraces which I have observed, but not yet explored, mainly to the east of the Widecombe-Grimspound road, opposite Blackaton Manor. These terraces appear to be very similar to those described here, and as they are outside Manaton parish the connexion between the terminations of some sets of terraces and the parish boundary which, from the plan, appears to be significant, must not be emphasized.