Note (return) — Chapter XIII

The Celts made their sacred places in dark groves, the trees being hung with offerings or with the heads of victims. Human sacrifices were hung or impaled on trees, e.g. by the warriors of Boudicca.662 These, like the offerings still placed by the folk on sacred trees, were attached to them because the trees were the abode of spirits or divinities who in many cases had power over vegetation.