We have no meanings for "vitrify forts" in our records yet.
1 Will Clerk says he has a theory on the vitrified forts .
2 These few examples will be enough to give some idea of the strange vitrified forts .
3 The vitrified forts surrounding England, but not in England.
4 The vitrified forts of Scotland, Ireland, Brittany, and Bohemia.
5 In the vitrified forts of a few parts of Europe, we find data that the Humes and Gibbons have disregarded.
6 But some of the vitrified forts are not upon tops of hills: some are very inconspicuous: their walls too are vitrified in streaks.
7 If so, we shall have to admit that vitrified forts date from the earliest centuries of the Christian era, and are not prehistoric at all.
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