Jacqueline Kennedy and David Ormsby Gore met frequently during John F. Kennedy's presidency, even taking shared vacations with their spouses.
But by 1967, both were widowed and bonding over their shared loneliness.
A year later, their relationship had turned romantic, at least on one side.
Ormsby Gore—a close friend of JFK and a former British ambassador to the US—proposed marriage to Jacqueline, who declined and wed Aristotle Onassis instead, reports the New York Times.
"If ever I can find some healing and some comfort—it has to be with somebody who is not part of all my world of past and pain," she wrote in one of 19 letters to Ormsby Gore to be sold at auction by Bonhams in London next month.
"I can find that now—if the world will let us."