British Library MS. Sloane 2640. Parchment Roll, of one membrane. 16th Century. The process of the philosopher's stone, by Thomas Charnock. The following note occurs at the foot of the Roll: 'Thomas Charnock of Stokeland, Bristow, who travelled all the realm of England over for to obtain unto the secrets of this science, which, as God would, he did attain unto, anno Domini 1555; as it appeareth more plainly in the Book which I dedicated unto Queen Elizabeth of England'. - 'Born at Feversham in Kent, 1526'.