Xenophon 
The Symposium [EPUB ebook] 

Xenophon the Athenian was born 431 B.C. He was a pupil of Socrates. He marched with the Spartans, and was exiled from Athens. Sparta gave him land and property in Scillus, where he lived for many years before having to move once more, to settle in Corinth. He died in 354 B.C.
The Symposium records the discussion of Socrates and company at a dinner given by Callias for the youth Autolycus. Dakyns believed that Plato knew of this work, and that it influenced him to some degree when he wrote his own ‘Symposium.’