The Odyssey by Homer Book 11 Page 29

But now tell me, and tell me true, can you give me any news of my son Orestes? Is he in Orchomenus, or at Pylos, or is he at Sparta with Menelaus — for I presume that he is still living.’

“And I said, ‘Agamemnon, why do you ask me? I do not know whether your son is alive or dead, and it is not right to talk when one does not know.’

“As we two sat weeping and talking thus sadly with one another the ghost of Achilles came up to us with Patroclus, Antilochus, and Ajax who was the finest and goodliest man of all the Danaans after the son of Peleus. The fleet descendant of Aeacus knew me and spoke piteously, saying, ‘Ulysses, noble son of Laertes, what deed of daring will you undertake next, that you venture down to the house of Hades among us silly