"Balthus felt his scalp prickle. Neither man nor any beast that he had ever seen could have left that strange, monstrous three-toed print, that was curiously combined of the bird and the reptile, yet a true type of neither. He spread his fingers above the print, careful not to touch it, and grunted explosively. He could not span the mark.
'What is it?' he whispered. 'I never saw a beast that left a spoor like that.'
'Nor any other sane man,' answered Conan grimly. 'It's a swamp demon—they're thick as bats in the swamps beyond Black River. You can hear them howling like damned souls when the wind blows strong from the south on hot nights.'"
Chapter 1 Conan Loses His Ax, Beyond the Black River, Robert E. Howard