“…99 Exceptions are Celenza, 1999;Celenza, 2001;Allen, 1982Allen, , 1994Allen, , and 2014Robichaud, 2016. 100 Ficino, however, tells Giovanni Pico della Mirandola that he read Arnaud de Villeneuve's De retardatione senectute, which we now know was the De retardatione senectutis attributed to Roger Bacon.…”