Mellon Collection, Yale University Library MS. 81. 239 folios. Paper. 193x115, with some folios in other formats. 18th Century Arcana divina et compendium cum clavibus Philosophischen Realitäten und Experimenten [in German and Latin.] [Compiled about 1743 by F.F. Weichenhaan, partly from materials written about 1705 by Anna Susanna Lieber.]