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.