«According to legend, Symeon was a knight who lost both of his eyes. He replaced them by putting star sapphires in the empty sockets, or so the singers claim. He fought with a long staff with blades at both ends and would spin it in his hands to chop down two men at once. He once visited the Nightfort where he saw hellhounds fighting»
(http://awoiaf.westeros.org/)
George R. R. Martin
A Song of Ice and Fire, A Game of Thrones
