Baron’s a curious one, who floats around the edges of the grimoire tradition. His most famous mentions come from the transcripts of the trial of Gilles de Rais, which describe him being offered human remains as what seems to have been a spontaneous “hey, why not?” gesture on the part of the (human) baron as part of his magical rituals. Baron also shows up in the Book of Oberon, as well as a smattering of other sources around the edges. I’ve selected him due to his status as an infamous but little-appearing spirit, which might test the thoroughness of the sources.
Having checked my sources, it seems I might have done far too well with this one. The vast majority of our reference works have no mention of him whatsoever, even after I searched for variant spellings and for Gilles himself. The only one who deals with him at all was de Plancy, who only gives a brief paragraph.
This one was a huge surprise. Given the variety of selections, I was prepared for at least some of them to be missing Baron, but not for his near-complete absence. He does receive attention in de Plancy (who I assume all these authors are examining) and Butler’s Ritual Magic, so he’s not completely out of left field. I think some more examples might help us decide how all of them stack up.