London, Wellcome Institute MS. 707. 21 folios. 200x140mm. 15th Century [c.1430.] Johannes de Rupescissa. Liber Lucis. [Followed by alchemical and medical receipts, in French and Latin, by another contemporary hand. It seems almost certain that this MS. originally formed part of a larger volumes containing MSS. Wellcome 523 and 418.]