Note 129 Nennius imputes to the Saxons the murder of three hundred British chiefs; a crime not unsuitable to their savage manners. But we are not obliged to believe (see Jeffrey of Monmouth, 1. viii. c. 9-12) that Stonehenge is their monument, which the giants had formerly transported from Africa to Ireland, and which was removed to Britain by the order of Ambrosius and the art of Merlin.

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The History Of The Decline and Fall Of The Roman Empire—Volume 1— Chapter 38