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.

Sotheby’s said the collection, which includes song lyrics and a Rolling Stones playlist, is expected to fetch between $111,300 and $159,000 and will go under the hammer on Dec. 12.