On 4 April 1967, Paul McCartney and Mal Evans had flown from England to the United States to meet Jane Asher on her 21st birthday. They spent several days on holiday in central and West Coast USA.
Asher was touring a production of Shakespeare’s Romeo And Juliet with the Old Vic theatre company, and on this day they flew out of Denver, where they had been based for a few days. McCartney and Evans stayed behind and visited the city’s Red Rocks Amphitheater, where The Beatles had performed on 26 August 1964.
Bert Rosenthal, whose house McCartney and Asher had stayed in during their Denver trip, then drove them to the airport. Their hired Lear jet took them to Los Angeles, where they stayed for two nights at the home of Derek Taylor and his wife Joan.