Oxford, Bodleian Library MS. Ashmole 1424. Part I. A collection of tracts relating to the Mineral Stone. Written by Thomas Robson. 3. 'The Merrore of Philosophie, of Mr John Dastine, being the Rosary of Arnoldus'. 5. 'The Key of Raymund Lully, which is calld his Apertory'. 32. 'The most excelent and true boke of the reverente docter Alemant and Lord Barnard Earle of Travison, of the philsophers stone, beginninge with the third chapter'. Part II. A collection of tracts relating to the Vegetable Stone. Written by Thomas Robson. 33. 'Here begineth te concordance between Guido and Raymond Lully'. 37. (1) 'A treatis of the most excelent Mr Dunstone Bishop of Canterbury, concerning the Philosophers stone'. 37. (2) 'George Riply his Bosome-booke. The wholle worke of the stone philosophicall'. 37. (3) 'Mr Samwell Norton's Key of Alchemy'.