St. Gallen, Bibliothek Vadiana MS. 403. 126 folios. Paper, Octavo. 16th Century [1530.] [Michael Cochem Alchym. Tract.] 1. f4-37 Incipit tractatus Correctio fatuorum appellatus. 2. f38-40 Calisthenes de natura mercurii. 3. f40-59 Rosulae elector. philos. Questio notab... ventilata p. mgr. ferariensem sub 1333 anno... 1530 scriptum p. m. C[ochem]. [Petrus of Ferrara or Petrus Bonus, was author of 'Margarita pretiosa novella'.]