British Library MS. Sloane 3763. 1. Apertorium Alphabetale, in which is contained the true art and practice of the wonderful philosophical science both for the transmutation of metals and for the cure and preservation of human infirm and imperfect bodies, by Christopher Parigginus. ff.1-88. Begins: 'Deare Son, This last of June we have received a letter by Mr. Agnolo'.