The Beatles (album)
"Dear Prudence" was about Mia Farrow's sister Prudence, who was also at the ashram in India. She spent long stretches of time meditating, and almost never came outside. Lennon wrote the song hoping to bring her out, to spend time with everyone. The guitar style he used on the song (and many songs afterwards) was the "clawhammer", a fingerpicking technique he learned from Donovan, another musician who went to India with them.