British Library MS. Sloane 2037. Paper. Quarto. 89 folios. 17th Century. 1. Printed book entitled 'Sanguis Naturae, or a Manifest Declaration of the sanguine and solar concealed liquor of Nature.' London, 1696. ff.1-60. 2. 'The third Book of Sanguis Naturae, which was as yet not printed in English, in this present year, 1705.' ff.61-89.