Plate III.
MOUND AND MOAT.
1. Houghton Mound.
2. Lemore Moat.
Plate IV.
THREE-POINT PROOFS.
1. Sighting Pond, Hereford Cathedral, Pen-y-Beacon.
2. Ford at Llanvihangel Mill, Road, Tre-Fedw Mound. (See [Plate II.])
When troublesome times came and stronger defences wanted, the groups of two or three sighting tumps which came near together (especially on the top of a hill) often had defensive earthworks added to make a fortified enclosed camp.