Bass guitar in 1958. 1956 saw the appearance at the German trade fair "Musikmesse Frankfurt" of the distinctive Höfner 500/1 violin bass made using violin construction techniques by Walter Höfner, a second generation violin luthier. The instrument is often known as the "Beatle Bass", due to its endorsement and use by Beatles bassist Paul McCartney. In 1957 Rickenbacker introduced the model 4000 bass, the first bass to feature a neck-through-body design in which the neck is part of the body wood. The Fender and Gibson versions used bolt-on and glued-on necks. With the explosion of the popularity of rock music in the
The Beatles in India the sky and when you see a cloud think of me". Saltzman recalls that the Beatles were "very close and tight" during his time at the ashram.<ref name="Kilachand/LiveMint"></ref> According to the diary kept by one of the Maharishi's aides, Ravindra Damodara, however, at times McCartney "talk[ed] mean" to Harrison and appeared to want to be the Beatles' "boss". Donovan taught Lennon a guitar finger-picking technique that McCartney partly mastered also. The technique was subsequently implemented by Lennon on the Beatles songs "Julia" and "Dear Prudence". The latter was composed by Lennon to lure Prudence Farrow out of her intense meditation.