Some support for this view is gained from study of the alchemistical writings of the period.
The earliest Greek alchemistical writings abound with references to Oriental authorities and traditions.
The descent of alchemistical doctrine can thus be traced with fair continuity for a thousand years, from the Greeks of Alexandria down to the time when Latin alchemy was firmly established in the West, and began to be written of by historical authors like Albertus Magnus, Roger Bacon and Arnoldus Villanovanus in the 13th century.
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