The hand-lettered title page for a Dutch translationSallwigt, 1708. of the influential esoteric work Opus mago-cabalisticum by the German alchemist and theosophical writer Georg von Welling served as source material for our Morte typeface.
The book’s translator and the designer of the title page are unknown. The roman numerals (ⅯⅮⅭⅭⅤⅢ) refers to the year 1708, when Welling started writing under the pseudonym Gregorius Anglus Sallwigt. The original German manuscript was first published – in incomplete form – in 1719,Sallwigt, 1719. and first made available in printed form in 1735.von Welling, 1735.
The life and works of von Welling was the subject of Petra Jungmayr’s dissertation, first published in Heidelberger Studien zur Naturkunde der frühen Neuzeit.Jungmayr, 1990.
Jungmayr, P. (1990). Georg von Welling (1655–1727): Studien zu Leben und Werk [Georg von Welling (1655–1727): Study of Life and Practice]. In W-D. Müller-Jahncke & J. Theile (Eds.), Heidelberger Studien zur Naturkunde der frühen Neuzeit [Heidelberg Studies on Natural History of the Early Modern Period]. Franz Steiner Verlag. Retrieved 20 September 2026 from brill.com
Sallwigt, G. A. (1719). Opus mago-cabalisticum et theologicum: vom Uhrsprung und Erzeugung des Saltzes, dessen Natur und Eigenschafft, wie auch dessen Nutz und Gebrauch ... [Opus mago-cabalisticum et theologicum: On the Origin and Production of Salt, its Nature and Properties, as well as its Use and Application ...]. Hasserode. Retrieved 20 September 2026 from archive.org
Sallwigt, G. A. (n.d.). Opusmago⸗Cabalisticum et Theologicum. Van den Oorspronk en Afkomſt des Zaoudts, Syner Natuer en Eygenſchap, Als ook Syner nuts en Gebruyk … [On the Origin and Production of Salt, its Nature and Properties, as well as its Use and Application ...]. (Original work published 1719).
von Welling, G. (1735). Herrn Georgii von Welling Opus mago-cabbalisticum et theosophicum. Darinnen der Ursprung, Natur, Eigenschafften und Gebrauch des Saltzes, Schwefels und Mercurii, in dreyen Theilen beschrieben … [Mr. Georgius von Welling's Mago-Cabbalistic and Theosophical Work. In which the Origin, Nature, Properties, and Use of Salt, Sulfur, and Mercury are Described in Three Parts…]. Bad Homburg. Retrieved 20 September 2026 from archive.org