Taeger and Blank (1996; p. 253) state that for some of the work, Oronzio was merely the editor,  Achille being the actual author, and whose name appears on the title page.
In Taeger and Blank's 1996 work, as stated on page 253, Oronzio acted primarily as an editor for some parts of their content, with Achille being the true author. Achille's name is included on the title page.