British Library MS. Harley 4486. 17th Century 1. A book of 117 pages, besides the Introduction, fairly written on Paper, containing a Book of Alchemy, with the following inscription by way of title, 'Coppie sur l'original du Summaire et Recapitualation des Chapitres suivants contenus en ce Livre. Et Achevé de coppier le quinzieme Septembre d'an de Grace Lil six cents trente et un. Pour Monseigneur de Baron de Tracy'. It contains an Introduction of 14 pages, and is divided into two books, the first of theory the second of practice; the former containing ten chapters, the latter two. In the old catalogue it is called, 'Livre de Chemie de M. Le Prevost de Paris', but this name does not now appear in it.