Some of them are rather short: "Hideous sound in the dark."
Not all are likely to be much use: "Phosphorescence of decaying wood — called in New England "fox-fire"."
Lovecraft being Lovecraft, a couple of them are cringe-inducing.
Others might be more viable: "Daemons, when desiring an human form for evil purposes, take to themselves the bodies of hanged men."
And there's at least one that's appeared in Buffy...