I'm wondering if only of you knowledgeable types might be able to help me out. I'm trying to remember the name of a Lovecraft story, but I've left all my books overseas so i can't look through them

I can't remember how the story goes, but it ends with the protagonists in a cellar, searching around in the darkness alone. He finds an open well, at the bottom of which is a humanoid creature (I believe it was hairless and white) and he's so shock he drops his flashlight and hears the creature eating it.
I'm afraid that's all I can remember. Does that ring a bell with anyone? Thanks in advance for any help,
Michael