What does menelaus tell Telemachus about his father

In Book 4 of the Odyssey, Telemachus is in Sparta. He is visiting Menelaus, the king of Sparta, in order to find out more information about his father Odysseus, who has been missing ever since the Trojan War started twenty years earlier ... They also tell him that Odysseus is most likely imprisoned on the isle of Calypso.