 King Louis XII granted him explicit permission for its publication, and also granted him special payment for many years of service.Eloy is most famous to music historians for having provided a long poem, "Le livre de la deablerie," recounting a dialogue between Satan and Lucifer, in which their nefarious plotting of future evil deeds is interrupted periodically by the author, who among other accounts of earthly and divine virtue, records useful information on contemporary musical practice.In addition to listing musical instruments, he lists who he considers to be the great composers of the time