British Library MS. Sloane 1782. Paper. Quarto. 87 folios. 17th Century. 3. Ludovici de Comitibus disceptatio de liquore Alchaest, et lapide philosophico, etc, Venetiis, 1671. Apparently written in short hand and imperfect. ff.50, 51. 4. 'To make Mercury or quicksilver fixt or solid,' etc. f.53. 6. Some chymical processes. ff.73-83.