Pausanias Description of Greece 1.39.3

[3] After the graves of the Argives is the tomb of Alope, who, legend says, being mother of Hippothoon by Poseidon was on this spot put to death by her father Cercyon. He is said to have treated strangers wickedly, especially in wrestling with them against their will. So even to my day this place is called the Wrestling Ground of Cercyon, being a little way from the grave of Alope. Cercyon is said to have killed all those who tried a bout with him except Theseus, who out matched him mainly by his skill. For Theseus was the first to discover the art of wrestling, and through him afterwards was established the teaching of the art. Before him men used in wrestling only size and strength of body.
  Such in my opinion are the most famous legends and sights among the Athenians, and from the beginning my narrative has picked out of much material the things that deserve to be recorded.

[3] After the tombs of the Argives is the tomb of Alope, who, they say, after she was made pregnant by Poseidon and became mother of Hippothoön, was at this very place put to death by her father Kerkyon. He is said to have treated strangers wickedly, especially in wrestling with them against their will. So even to my day this place is called the Wrestling Ground of Kerkyon, being a little way from the tomb of Alope. Kerkyon is said to have killed all those who tried a bout with him except Theseus, who outmatched him mainly by his skill. For Theseus was the first to discover the art of wrestling, and through him afterwards was established the teaching of the art. Before him men used in wrestling only size and strength of body. Such in my opinion are the best-known stories [ logoi] and sights [ theõrēmata] that the Athenians possess, and from the beginning my own narrative [ logos] has picked out, from such many things, those that stand out as worth writing-up [ sun-graphein].