British Library MS. Sloane 3505. Paper. Quarto. 239 folios. 17th Century. 4. 'Liber alius domini Gilberti North'. ff.172-239. Among the collections under this title may be distinguished. a. An alchemical work, called 'the soule of the planets'. ff.200-205. b. 'Aurum potabile a domino Richardo Comite Palatino, in July, anno 1572 Ludovico Palatino transmissum; quod ipse dua preparavit et fit hoc modo'. f.206. c. 'Tinctura auri a domini Quercetano cuidam magnati aliquando communicata'. f.207. d. Various receipts for making 'aurum potabile'. ff.208b-214. e. 'Aqua vitae Regis Frederici 3, Romanorum Imperatoris, qua vitam suam Deo benedicente diu sustentavit, siquidem imperio Romanis praefuit, quamquam factus descriptus'. ff.214ff-218.