Erfurt Quarto 290 includes two commentaries on Aristotle40, 1 chiefly on the basis of a thirteenth-century ascription to Richard Rufus, deciphered by Fr. Leonard Boyle; the aim of this essay is to show that the author of the commentary on folios 4640, the Scriptum, but that seems misleading since Noone also claims that what we have is a record preserved by its auditors, a reportatio. And in medieval scholarly practice, a reportatio is distinguished from a scriptum, which is a written (...) version corrected by the author and meant for publication. In order not to prejudice the question whether this commentary is reportatio or a scriptum, we will call it the DissertatioinMetaphysicamAristotelis, taking the term from the workPlacetnobisnuncparumperdissereredequadampropositionequamdicitAristotelesin56 probably dates from around 1235, but the basis for that claim will be stated at the end of this paper. (shrink)