Mellon Collection, Yale University Library MS. 121. 33 folios. Paper. 435x184mm. 18th Century [c. 1775.] Thesaurus thesaurorum. [in Latin with a few words in French.] [Belonged to Baron de Toussainct.] [ff11r-32r 30 numbered drawings which are often divided into two, the upper part having a flask upon a furnace, while the lower has a symbolic representation of the partitcula process intended.] [The text is related to Trésor des trésors, found in Bibliothèque l'Arsenal MS. 975, and the illustrations relate to the Donum Dei series.] [Interspersed among the 'flask series' in this manuscript are 12 of the hermaphrodite figures from the Rosarium Philosophorum series.]