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In prehistoric times, Europe wascovered with vast primeval woods and forests, which must have deeply influenced the minds as well as the lives of our ancestors. In places where they had not made clearings, they must have Jived in a constant half-light. As far as we know, the oak was the commonest and most useful tree. We get our evidence partly from the statements of some classical writers, but more convincingly from theremains of ancient villages built on wooden piles in lakes and from the oak forests which have been found embedded in peat bogs. These bogs, which are most evident in northern Europe, but which are also found in some central and southern parts of the continent, have preserved the plants and trees which flourished after the end of the Ice Age. The great peat bogs of Ireland reveal that there was a time when vast woods of oak and yew covered the country, the oak growing on hills that were up to a height of four hundred feet or so above the sea, while the yew grew at higher levels . Ancient roadways made of oak have been found, as have, more famously, human relics.
