“Pattie, don’t forget I love you,” George Harrison wrote to his wife, the model and photographer Pattie Boyd, in the 1960s. In 1970, Eric Clapton wrote to her, “What I wish to ask you is if you still love your husband, or if you have another lover?” Married to Harrison between 1966 and 1977, and to Clapton between 1979 and 1988, Boyd is known as Rock and Roll’s most influential muse. She met Harrison while playing a schoolgirl in the 1964 Beatles film A Hard Day’s Night, and inspired songs like “Something.” Clapton, Harrison’s good friend, gave Boyd the nickname Layla, and secretly confessed his feelings for her in his song of the same name, in 1970. Boyd is now making the love triangle public in an auction of memorabilia and personal items. Highlights include handwritten lyrics for Harrison’s “Mystical One,” estimated at £50,000, and the original artwork Clapton chose for the cover of the 1970 album Layla and Other Assorted Love Songs, estimated at £60,000. —Jeanne Malle