The 'Twelve Keys', ascribed to Basil Valentine, was printed under different names and as part of collections of texts. Thus the French versions appeared as Les Douze Clefs, and there were versions in German included in Vom dem Grosses Stein and the Chymische Schriften.
The sequence of publications through the 17th into the late 18th century used a number of different woodcut and engraved versions of the imagery of the 'Keys'.
For the first time all these different versions are printed, together with the text and the later commentary in the 'Last Testament'.