British Library MS. Sloane 3831. Paper. Folio. 13 folios. 17th Century. 1. A treatise of the philosophers stone, in five chapters; entitled 'A conference between an young man, new come at age, and Senior an Arabian Sophos; done from the originall into Latine by William of Torrescissa, a midland Britain, and now into English by [ ]'. f.1-7.