Most of Syd's scary stories come from literature. Here are a few of his favorites:

The Tell-Tale Heart
The Poe classic about a man with a guilty conscience
The Cask of Amontillado
Poe's tale of revenge in dank catacombs
Hop Frog
Poe's mistreated dwarf and his fiendish revenge
The Facts in the Case of M. Valdermar
Poe's story about halting the process of death
Occurrence at Owl Creek Bridge
An Ambrose Bierce Civil War tale
The first monster story
The Pardoner's Tale
Chaucer's warning about the result of greed
Swamp monster lurking nearby