This post begins: The Jules De Grandin stories by Seabury Quinn were not innovative so much as reactionary. Anyone familiar with the Horror and Mystery of the previous generation can easily glean where the author found inspiration. Quinn’s magic lies not in creating a Cthulhu Mythos, but in taking a fully modern approach to the old stand-bys, like Fritz Leiber, dragging the horror into the 20th Century.
If you’d like to read the rest, please check out Monster: From the Pages of Dark Worlds Quarterly.