Note 064
William of Malmsbury (l. iv. c. 2, p. 209) quotes the Itinerary of the monk Bernard, an eye-witness, who visited Jerusalem A.D. 870. The miracle is confirmed by another pilgrim some years older; and Mosheim ascribes the invention to the Franks, soon after the decease of Charlemagne.]
The History Of The Decline And Fall Of The Roman Empire Fall In The EastChapter 57