According to author Jonathan Gould, the impact of "Norwegian Wood" "transformed" Ravi Shankar's career, and the Indian sitarist later wrote of first being aware of a "great sitar explosion" in popular music during the spring of 1966, when he was performing a series of concerts in the UK. Harrison developed a fascination for Indian culture and mysticism, introducing it to the other Beatles. In June 1966, Harrison met Shankar in London and became a student under the master sitarist. Having added the sitar accompaniment to "Norwegian Wood", Harrison expanded upon his initial effort by writing "Love You To", which showcased his immersion in Indian music, and presented an authentic representation of a non-Western music form in a rock song. Prior to the recording sessions for "Sgt. Pepper's Lonely Hearts Club Band", Harrison made a pilgrimage to Bombay, India with his wife Pattie, where he continued his studies with Shankar and was introduced to the teachings of several yogis. Harrison contributed "Within You Without You" to "Sgt. Pepper", featuring himself as the only performing Beatle together with uncredited musicians playing dilruba, swarmandal and tabla, alongside a string section. For the remainder of his career, he evolved his understanding of Indian musicianship, particularly in his slide guitar playing.