I'm having a difficult time finding that book, but I'm keeping my promise of posting a link to it as soon as I can. Last time I read it was a little over a year ago on a website I don't remember. It offered a good handful of ghoul folk stories, each story accompanied by notes about their relevance to ancient Arabic culture.
I did however find this segment of an article which discusses the folkloric origin of ghouls.
[
science.howstuffworks.com]
It's very brief and there aren't so many sources, but the author confidently states that the original Arabic ghuls were not grave-diggers, confirming some of what you shared. William Beckford may have also played a role in further cementing the relatively recent belief that ghouls are scavengers. Hope this helps; I'm gonna look even deeper into this.
Edited 2 time(s). Last edit at 27 Oct 19 | 01:50AM by Yluos.