The Beatles in Hamburg later Kirchherr met the Beatles at the Hamburg airport and told them Sutcliffe had died of a brain haemorrhage. In 1966, Voormann was asked by Lennon to design the sleeve for the Beatles' album "Revolver", and also played bass on solo recordings by Lennon, McCartney, Harrison, and Starr. In 1995, Voormann designed the artwork for the three-volume CD sets in The Beatles Anthology series. In 1999, Kirchherr published a book called "Hamburg Days" (a two-volume limited edition) containing a set of photographs by Kirchherr and "memory drawings" by Voormann of the Beatles time in Hamburg. The Beatles returned to Hamburg
A Collection of Beatles Oldies Out" and "Paperback Writer", were remixed in stereo for the album, since the majority of the Beatles' singles had only been mixed for mono release previously. The stereo mixing was overseen by George Martin, the Beatles' producer, with none of the band members present. The mixing sessions took place between 31 October and 10 November 1966 at EMI Studios (later Abbey Road Studios) in London. Martin was surprised at how time-consuming the remixing of "She Loves You" and "I Want to Hold Your Hand" proved to be. In the case of "She Loves You", the 1963 two-track recording tape had