From Bob Dearborn's The Olde Disc Jockey's Almanac today...
August 28, 1968…At Trident Studios in London, the Beatles began recording a new John Lennon composition, "Dear Prudence." They built the song instrument by instrument, utilizing the 8-track equipment at Trident that was not yet available at Abbey Road Studios. John and George played guitars while Paul played drums in place of Ringo, who had temporarily quit the band less than a week earlier.
