LONDON -- Handwritten letters from Rolling Stones frontman Mick Jagger to his former lover Marsha Hunt will be auctioned in London next month.

Hunt is an American-born singer who was the inspiration for the Stones' 1971 hit "Brown Sugar" and bore Jagger's first child.

Sotheby's said Saturday that Hunt has tasked the auction house with selling 10 letters written from the set of Jagger's film "Ned Kelly," which was shooting in Australia.

Hunt said the letters chronicling their "delicate love affair" and secret history touch on subjects such as the first moon landing and John Lennon and Yoko Ono.

"When a serious historian finally examines how and why Britain's boy bands affected international culture and politics, this well-preserved collection of Mick Jagger's hand written letters will be a revelation," she said in a statement distributed by the auction house.

Sotheby's books specialist Gabriel Heaton said the letters sent in the summer of 1969 show a "poetic and self-aware" 25-year-old Jagger.

"They provide a rare glimpse of Jagger that is very different from his public persona: passionate but self-contained, lyrical but with a strong sense of irony," Heaton said.

Sotheby's said the collection, which includes song lyrics and a Rolling Stones playlist, is expected to fetch between 70,000 and 100,000 pounds ($111,300 and $159,000) and will go under the hammer on December 12.

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  • Mick Jagger walking off stage, Anaheim, CA 1978

  • The Rolling Stones posing with a group of ladies, during rehearsals for ABC's 'Thank Your Lucky Stars' TV pop music show at Teddington Studios, London, 11th November 1964

  • Keith cooking in the kitchen of Andy Warhol's Montauk home where the Rolling Stones were rehearsing for their 1975 Tour of the Americas.

  • 1972 U.S. Tour

  • Mick & Aston Martin London 1966

  • This shot was taken backstage at the rehearsals for ABC's "Thank Your Lucky Stars." 1964

  • Stones Primrose Hill, London 1966 -- an outtake from the Between The Buttons cover shoot.

  • Rolling Stones at the Alamo; 1975

  • Rolling Stones onstage 1972 (location unknown)