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Roger Bacon (30  October  1833) Unable to identify with certainty. The British Library holds the following and other similar titles that would interest WG in his research for Lives of the Necromancers:
Bacon, RogerSanioris medicinae magistri Rogeri Baconis Angli, De arte chymiae scripta. Cui acceserunt opuscula alia ejusdem authoris. 1603
OR
Bacon, RogerDoctissimi viri Rogerii Bachonis de alchemia libellus, cui titulum fecit, Speculum alchemiae. 1541
WG's Lives of the Necromancers cites Bacon's ‘Epist. ad Clement IV.' Unable to locate in British Library.

Mentions in the Diary

• 30  October  1833