British Library MS. Royal 12 G. iv.
226 folios. Vellum. 330x228mm. 14th-15th Centuries.

11. f163v [Alchemical note with ten hexameter verses on the transmutation of quicksilver into silver.]
[Begins] : 'Ad declarandum textum versuum infrascriptorum respicias librum aureum qui dicitur ortus sapientie et thesaurus philosophorum'.