Hand" proved to be. In the case of "She Loves You", the 1963 two-track recording tape had since been reused, forcing EMI engineer Geoff Emerick to return to the mono master and create a "mock stereo" mix. This was achieved through removing the high frequencies from the left channel and the low frequencies from the right. They had also intended to remix "From Me to You", the Beatles' first song to top the Record Retailer chart, but this did not take place. The final day of the album's preparation was carried out without Martin and Emerick. Author Kenneth Womack writes of their absence, as of the Beatles' non-participation: "Clearly, A Collection of Beatles Oldies was the sole priority of EMI at this juncture." Two other EMI engineers, Peter Bown and Graham Kirkby, remixed "Day Tripper" and "We Can Work It Out" that day. They then worked on "This Boy", the B-side of "I Want to Hold Your Hand", but this was due to a miscommunication with EMI's office in Manchester Square, where the song had been confused with "Bad Boy". The error was discovered later, by which point there was no time to remix "Bad Boy" and the original mix was used for the compilation. Artwork The album cover is a painting by artist David Christian, who captured the vibrant colours then popular in London's Carnaby Street fashion boutiques. In the description of music journalist Martin O'Gorman, the cover image partly reflects the popularity of retro boutiques such as I Was Lord Kitchener's Valet; it also includes a man with a mop-top haircut reclining on a chair and "clad in Day-Glo striped trousers and a garishly patterned tie". O'Gorman adds that, except for the moustaches that the four Beatles had recently grown, the artist had captured the band's new psychedelic image, which would be unveiled in the film clips for the two songs on their next single, "Strawberry Fields Forever" and "Penny Lane". According to a report in the 3 December issue of Billboard magazine, the painting was a "colorful Op-Art" work that had been commissioned by Epstein. The back of the LP sleeve featured a photograph of the group taken by Robert Whitaker. The photo was taken in the Tokyo Hilton, where the band members were confined for much of their 1966 concert tour of Japan due to security concerns. Author Colin Larkin comments that, in comparison with their