Harold Holt was the 17th Prime Minister of Australia who was in office from 1966 until he disappeared in 1967. One day in December 1967 he decided to take a swim at the remote Chevriot Beach. Apparently while he was out in deep waters, he got caught in a rip and disappeared entirely. Despite an extensive search operation, he was never found.
Connie Converse was a singer-songwriter who was active during the 1950’s in New York City. After becoming depressed and burnt out, she decided she wanted to embark on a new life in 1974 and she left her family home and was never seen again. Her music was not very well known until a 2004 radio show played her music and her album How Sad, How Lovely was released in 2009.