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Roger Bacon held that three classes of substance were capable of magic: the herbal, the mineral, and the verbal. With their leaves of fiber, their inks of copperas and soot, and their words, books are an amalgam of the three.

Roger Bacon held that three classes of substance were capable of magic: the herbal, the mineral, and the verbal. With their leaves of fiber, their inks of copperas and soot, and their words, books are an amalgam of the three.

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Attribution & collection notes
Author or tradition
Matthew Battles
Attribution: attributed
Country attributed
Not established
A country attribution does not establish the earliest origin.
Historical period
Historical period not yet established
No sufficiently supported historical placement has been established. Import and download dates are not treated as composition dates.
Recorded source
Contributor-provided quotation collection

Supplied reference C; CSV row 64443; supplied attribution, independently unverified

A collection's publication date can be later than the words it records.