Though lesbian literature had not yet evolved as a distinct genre in English in the 19th century, lesbian writers like the essayist and supernatural fiction writer Vernon Lee sometimes hinted at lesbian subtexts in their work or, like Lee's lover Amy Levy, wrote love poems to women using the voice of a heterosexual man. Others wrote, but kept their writing secret. Beginning in 1806, English landowner and mountaineer Anne Lister kept extensive diaries for 34 years, which included details of her lesbian relationships and seductions, with the lesbian sections written in secret code. The diaries were not published until the 1980s. In 2010, they were the basis for a BBC television production, "The Secret Diaries of Miss Anne Lister".