The music universe did not know it at the time but it was deprived of one of the most unique endeavors ever proposed.
Hendrix, Davis and the jazz trumpeter's drummer, Tony Williams, were making plans to record an album together with producer Alan Douglas, and decided to call on The Beatles legend to join them on bass.
They sent out the invite via telegram on October 22, 1969, writing, "We are recording and (sic) LP together this weekend. How about coming in to play bass stop call Alan Douglas 212-5812212. Peace Jimi Hendrix Miles Davis Tony Williams."
The message was received by The Beatles aide Peter Brown, who responded and told them McCartney was on vacation in Scotland.
The collaboration never came to fruition and Hendrix died from a drug overdose months later, in September, 1970.
The telegraph has gone on display at the Hard Rock Cafe in Prague, in the Czech Republic.