Description of Greece
Pausanias
Pausanias. Pausanias Description of Greece, Volumes 1-4. Jones, W.H.S. (William Henry Samuel), translator; Ormerod, Henry Arderne, translator. London, New York: W. Heinemann, G.P. Putnam's Sons, 1918-1935.
There is also another temple, all round which stand statues. This temple is right opposite that of Chthonia, and is called that of Clymenus, and they sacrifice to Clymenus here. I do not believe that Clymenus was an Argive who came to Hermion “Clymenus” is the surname of the god, whoever legend says is king in the underworld.
Beside this temple is another; it is of Ares, and has an image of the god, while to the right of the sanctuary of Chthonia is a portico, called by the natives the Portico of Echo. It is such that if a man speaks it reverberates at least three times. Behind the temple of Chthonia are three places which the Hermionians call that of Clymenus, that of Pluto, and the Acherusian Lake. All are surrounded by fences of stones, while in the place of Clymenus there is also a chasm in the earth. Through this, according to the legend of the Hermionians, Heracles brought up the Hound of Hell.