London, Wellcome Institute MS. 2492. 1 folio + 165 pages. 320x200mm 18th Century [c. 1735] Gemma Sapientiae et Prudentiae. [In German throughout]. [Illustrated with 5 full-page coloured and illuminated symbolic drawings, four of which are from the Geheime Figuren, and a smaller illustration of the 'Sigillum Sielentium Arts', showing two double-headed eagles.] [The text is a remarkable mixture of transcendental alchemy, Cabbalistic speculations, and religious controversies. It ends with a chapter on Biblical prophecies and the Apocalypse.]