of pot and cocaine for London's hip set", and friend of the Beatles and the Rolling Stones. In a 1980 interview that Fontenot says "muddied the issue further", Lennon said the song was "mainly about drugs and pills" but: "It was about myself. I was the one that carried all the pills on tour." In a 2009 article for the Spinner website, James Sullivan listed three other people who were speculated to be the inspiration for Dr Robert: Bob Dylan, who had introduced the Beatles to marijuana in the summer of 1964. Dr Robert MacPhail, a fictional character in Aldous Huxley's 1962 book Island. John Riley, a dentist acquaintance of John and Cynthia Lennon, George Harrison and his wife, Pattie Boyd. At a dinner party attended by Lennon and Harrison and their partners in March 1965, Riley had laced their coffee with LSD, providing the two Beatles with their first experience of the drug. Musical characteristics "Doctor Robert" uses the keys of A major and B major, and its melody is in the Mixolydian mode based on B. The musical arrangement has staggered layering, with backing vocals starting in the second verse, the lead guitar entering just before the bridge, and the bridge itself featuring added harmonium and extra vocals. Lennon's lead vocal is automatically double tracked with each of the two slightly-out-of-phase tracks split onto separate stereo channels; creating a surrealistic effect supporting the lyric about drug use. An interesting feature is the suitably "blissful" modulation (on "Well, well, well, you're feeling fine") to the key of B on the bridge via an F7 pivot chord (VI7 in the old key of A and V7 in the new key of B). The extended jam that lasts 43 seconds at the end was recorded, but it was removed and replaced with a fade-out. In the US mono mix of the song, as released on Yesterday and Today, Lennon appears to say "OK, Herb" at the very end of the track. Recording The Beatles recorded "Doctor Robert" during the early part of the Revolver sessions. The session for the song took place on 17 April 1966 at EMI Studios (now Abbey Road Studios) in London. It was a relatively straightforward track to record, compared to the more experimental songs such as "Tomorrow Never Knows" and "Rain". The band achieved a satisfactory basic track after seven takes, with a line-up comprising Lennon