Linda McCartney reason whatsoever other than she fell in love with Paul McCartney." During their 29-year marriage, the McCartneys had four children: she brought her daughter Heather from her first marriage (whom Paul later formally adopted), and together the couple had Mary (b. 1969), Stella (b. 1971), and James McCartney (b. 1977). They sometimes went to his farmhouse retreat in western Scotland, which he purchased before they met, a hidden place he used to "escape Beatlemania." They both liked and needed time away from the city, and were equally attracted to natural surroundings, writes biographer Barry Miles. "We'd just enjoy sitting out
Paul McCartney in 1968, the two got into an argument over McCartney's critique of Starr's drum part for "Back in the U.S.S.R.", which contributed to Starr temporarily leaving the band. Starr later commented on working with McCartney: "Paul is the greatest bass player in the world. But he is also very determined ... [to] get his own way ... [thus] musical disagreements inevitably arose from time to time." McCartney and Starr collaborated on several post-Beatles projects starting in 1973, when McCartney contributed instrumentation and backing vocals for "Six O'Clock", a song McCartney wrote for Starr's album "Ringo". McCartney played a kazoo solo