[1] A native of Stymphalus, he was an older man when he recruited and led one thousand hoplites to join Cyrus.
[2] Writing in the fifth century AD, Stephanus of Byzantium cites on four occasions a certain Anabasis Kyrou written by Sophaenetus.
Pieces of advice attributed to Sophaenetus entered the military handbooks and were misunderstood to refer to a book written by him.
[4] Some scholars who accept the authenticity of the Anabasis Kyrou regard it as the probable source of those elements in Diodorus Siculus' account of the Ten Thousand in his Bibliotheca historica that cannot be found in Xenophon.
If the latter are correct, Diodorus probably encountered the Anabasis Kyrou indirectly, through Ephorus and the Hellenica Oxyrhynchia.