"Black monstrous bridges across oily rivers,
Cobwebs of cable by nameless things spun;
Catacomb deeps whose dank chaos delivers
Streams of live foetor, that rots in the sun."
H.P. Lovecraft, The Cats
"Beside it had been carved two squat squid-like figures from a part of which — presumably the heads, though no outline was definitive — projected what must certainly have been instruments of some kind, for the strange, repugnant attendants appeared to be playing them."
"They mostly take the shape of a gigantic human but may be invisible or take other shapes, such as that of a vast and grotesque beast."