Original: Similar themes appear in '' The Lurking Fear '' ( 1922 ) and '' The Rats in the Walls '' ( 1924 ) , both of which posit the existence of subterranean clans of degenerate , retrogressive cannibals or carrion-eating humans .
Simplified: Similar themes appear in '' The Lurking Fear '' ( 1922 ) and '' The Rats in the Walls '' ( 1924 ) .