Due to Polygonus' and Telegonus' "stranger-slaying wrestling", Proteus prayed to his father Poseidon to carry him back to Egypt away from them. Under the command of Hera, the brothers challenged the hero Heracles to wrestle but lost their lives in the battle.[4]
John Tzetzes, Book of Histories, Book II-IV translated by Gary Berkowitz from the original Greek of T. Kiessling's edition of 1826. Online version at theio.com
Stephanus of Byzantium, Stephani Byzantii Ethnicorum quae supersunt, edited by August Meineike (1790-1870), published 1849. A few entries from this important ancient handbook of place names have been translated by Brady Kiesling. Online version at the Topos Text Project.