<Tr> <Td_colspan="2"> Art by John Cassaday </Td> </Tr> <Tr> <Th_colspan="2"> Publication information </Th> </Tr> <Tr> <Th> Publisher </Th> <Td> Street & Smith Condé Nast </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> Detective Story Hour (July 31, 1930) (radio) "The Living Shadow" (April 1, 1931) (print) </Td> </Tr>

Who knows what evil lurks in the heart of man the shadow knows