The Whisperer in Darkness
Robert M. Price notes that "Lovecraft's Tsathoggua and Smith's differ at practically every point". Lovecraft, dropping Smith's bat and sloth comparisons, refers to the entity in "The Whisperer in Darkness" as the "amorphous, toad-like god-creature mentioned in the Pnakotic Manuscripts and the Necronomicon and the Commoriom myth-cycle preserved by the Atlantean high-priest Klarkash-Ton" (the priest's name was Lovecraft's nickname for Tsathoggua's creator).