"They stay for one year, until Odysseus finally begs her to let them go home. She replies that they must first visit the land of the dead and hear a prophecy from the ghost of Tiresias (Circe, the Grace of the Witch 387)." Circe tells Odysseus and his crew to go to the land of the dead and listen to Tiresias.
"...unburied to tempt the God's wrath, while you sail for home; but fire my corpse, and all the gear I had and build a cairn for me above the beakers-..."(Homer 48-51), This is when Odysseus meets Elpenor who died when he fell off the roof and tells him to bury him in Circe.
"At this I step aside, and in the scabbard let my long sword ring home to the pommel silver, as he bent down to the sombre blood. Then spoke the prince of thoose with gift of speech (Homer 74-77)." This is when he meets Tiresias and he tells him about all the dangers he has to face and how to get to Ithaca.
"She tells him that Penelope and Telemachus are still grieving for him and that his father, Laertes, has moved to another country, where he, too, mourns his son. (The Land of the Dead 391)" Odysseus meets his mother and she tells him that everyone is waiting for him at home and suicided because she died from a broken heart.
"While his men sleep, Circe takes Odysseus aside to hear about the underworld and to offer advice (The Sirens; Scylla and Charybdis 392) " Odysseus tells Circe about what Terisias said and gives more advice and things to do throughout his journey,
"Odysseus decides to tell the men only of Circe's warnings about the Sirens, whom they will soon encounter (The Sirens; Scylla and Charybdis)." He now has left Circe's Island, but only told the crew about one part of the journey.