British Library MS. Sloane 3697. Paper. Quarto. 109 folios. 17th Century. 1. Morieni Romani, quondam Eremitae Hierosolymitani de re metallica, metallorum transmutatione, etc., liber a Roberto Castrensi ex Arabico in latinum translatus. [English]. ff.1-43. Printed in latin, 4to, Paris, 1564. 2. A letter on the Philosophers' Stone 'to my speciall Friend and loving brother Abell Berner'. ff.43b-52. Begins: 'In the begining it behoveth the skillfull Artificer to be carefull'. 3. A collection of Alchymical processes, written down as they occurred to R. Kellum, in 1721. ff.53-60. 5. Mirabilis experientia di Fra. Gregorio, discepolo d'Arnol. di Villa Nova, and other Chymical processes. [Latin]. ff.73-86.