A British collector spent four decades gathering Admiral Lord Horatio Nelson’s letters, naval documents and manuscripts​;​ the archive, including letters to Emma Hamilton, is now up for auction at Sotheby’s for an estimated £4 million to £6 million

Rare letters and documents belonging to Navy commander Vice-Admiral Lord Horatio Nelson are up for auction at Sotheby’s as part of a collection of 415 historical documents, manuscripts and letters.…