pop artists seeking to add an exotic quality to their music. The harpsichord-like solo on "In My Life" led to a wave of baroque rock recordings. Rubber Soul was also the release that encouraged many folk-music aficionados to embrace pop. Folk singer Roy Harper recalled: "They'd come onto my turf, got there before me, and they were kings of it, overnight. We'd all been outflanked..." Author George Case, writing in his book Out of Our Heads, identifies Rubber Soul as "the authentic beginning of the psychedelic era". Music journalist Mark Ellen similarly credits the album with having "sow[ed] the seeds of psychedelia", while Christgau says that "psychedelia starts here." Writing in The Sydney Morning Herald in July 1966, Lillian Roxon reported on the new trend for psychedelia-themed clubs and events in the US and said that Rubber Soul was "the classic psychedelic album now played at all the psychedelic discotheques". She attributed pop's recent embrace of psychedelia and "many of the strange new sounds now in records" to the LP's influence. In Myers' view, the Capitol release "changed the direction of American rock". In the ongoing process of reciprocal influence between the band and US folk rock acts, the Beatles went on to inspire the San Francisco music scene. Recalling the album's popularity in the Haight-Ashbury district of San Francisco, where Jefferson Airplane were based, journalist Charles Perry said: "You could party hop all night and hear nothing but Rubber Soul." Perry also wrote that "More than ever the Beatles were the soundtrack of the Haight-Ashbury, Berkeley and the whole circuit", where pre-hippie students suspected that the album was inspired by drugs. Citing a quantitative study of tempos in music from the 1960s, Walter Everett identifies Rubber Soul as a work that was "made more to be thought about than danced to", and an album that "began a far-reaching trend" in its slowing-down of the tempos typically used in pop and rock music. While music historians typically credit Sgt. Pepper as the birth of progressive rock, Everett and Bill Martin recognise Rubber Soul as the inspiration for many of the bands working in that genre from the early 1970s. Appearances on best-album lists and further recognition Rubber Soul was voted fifth in Paul Gambaccini's 1978 book Critic's Choice: Top 200 Albums, based on submissions from a panel of 47 critics and broadcasters including Richard Williams, Christgau and Marcus. In the