LONDON — Miles and Jimi. Jimi and Miles. Fans of the late trumpet and guitar masters have long known that Miles Davis and Jimi Hendrix had been making plans to record together in the year before Hendrix’s sudden death in 1970.

But less attention has been paid to the bass player they were trying to recruit — Paul McCartney, who was busy with another band at the time.

This tantalizing detail about the super group that never was — jazz standout Tony Williams would have been on drums — is contained in an oft-overlooked telegram that Hendrix sent to McCartney at The Beatles’ Apple Records in London on Oct. 21, 1969.

“We are recording and LP together this weekend,” it says, complete with a typographical error. “How about coming in to play bass stop call Alan Douglas 212-5812212. Peace Jimi Hendrix Miles Davis Tony Williams.”

The telegram, advising McCartney to contact producer Douglas if he could make the session, has been part of the Hard Rock Cafe memorabilia collection since it was purchased in 1995. It has generated attention only in recent months with the successful release of “People, Hell & Angels,” expected to be the last CD of Hendrix’s studio recordings.

“It’s not something you hear about a lot,” Hard Rock historian Jeff Nolan said of the telegram, now displayed at the restaurant in Prague. “Major Hendrix connoisseurs are aware of it. It would have been one of the most insane supergroups. These four cats certainly reinvented their instruments and the way they’re perceived.”

French promoter and Hendrix fanatic Yazid Manou, who has researched the telegram, said it offers a glimpse of what might have been.

“It’s amazing because of the names of the people,” he said. “Of course that didn’t happen, but the telegram brings us something to dream about. This is a document, proof that they had an idea to do an album.”

The telegram raises more questions than it answers. It’s not clear if McCartney was even aware of the apparently impromptu invitation to rush from his London base to New York for the planned session.

Beatle aide Peter Brown replied on McCartney’s behalf, telling Hendrix the following day that McCartney was on vacation and not expected back for another two weeks.