British Library MS. Sloane 3162. Paper. Quarto. 34 folios. 16th and 17th Centuries. Written by various hands. 1. A treatise of Alchemy. ff.3-13. Begins: 'In all manner of thynges that you that worke .... the laborer behoveth that the begynyng'. 2. Directions for making a charmed seal, in Latin. dated 30 January 1650, and signed Ja. Co. f.14. 5. Figures of retorts, furnaces, etc, with remarks on their construction, in Latin. ff.16-19. 8. Alchemical verses, forming the preface to a longer work. f.20b. Begins: 'If thou will have a cunninge grete A science of grete prise, Give care to me and lkisten well Then follow myne advyse'. At the end: 'Finis praefactionis operis philosophici'. 10. Fragment of an alchemical tract; 16th century. f.23. 12. Quaedam tam ex Gebri Summa Perfectionis magisterii, quam ex Hieronymi Castellionei Cardani De Subtilitate secundo libro: 17th Century. f.26. 13. Various chemical, alchemical and medical receipts. 16th Century. ff.27-34.