Question: When was the only novel of  Emily Brontë published in which  Edgar Linton is a fictional character?

Context articles: Dimitri Marick
Wuthering Heights (musical)
Emily Brontë's Wuthering Heights
Wuthering Heights
Ponden Hall
Catherine Linton
Isabella Linton
Hareton Earnshaw
Wuthering Heights (1970 film)
Edgar Linton

Dimitri Marick is a fictional character from the American ABC soap opera "All My Children".
 The role has been most notably portrayed by Michael Nader, previously famed for his role on "Dynasty".
 Former head writers Agnes Nixon and Lorraine Broderick created the character in 1991, designing him as a brooding and mysterious character based on heroes from gothic literature, such as Maxim de Winter from Daphne du Maurier's novel "Rebecca" and Heathcliff from Emily Brontë's novel "Wuthering Heights".
<ref name="SOD 11/26/91 "> </ref><ref name="SOW 11/14/91 "> </ref> The character's introduction raised "All My Children" in the Nielsen ratings and was credited as the "saving grace" of the unpopular Natalie and Janet storyline.
<ref name="Soap Opera Weekly 11/14/91"> </ref><ref name="SOU 11/19/91 "> </ref>
Wuthering Heights is Bernard J. Taylor's musical/operatic version of Emily Brontë's novel of the same name.
 The musical first appeared in 1992 as a studio recording featuring Lesley Garrett as Cathy, Dave Willetts as Heathcliff, Bonnie Langford as Isabella Linton and other stars of Britain's West End stage.
 The show has since been translated into six languages from the original English and has been extensively staged in the UK, USA, The Netherlands, Germany, Poland, Romania, Australia and New Zealand.
 In 2008 a production was being planned in Budapest, Hungary, where Taylor's "Much Ado" received its European continental premiere in 2007.
 Lesley Garrett has included her recording of 'I Belong To The Earth' on two of her solo albums.
Emily Brontë's Wuthering Heights is a 1992 feature film adaptation of Emily Brontë's novel "Wuthering Heights" directed by Peter Kosminsky.
Wuthering Heights is Emily Brontë's only novel.
 Written between October 1845 and June 1846, "Wuthering Heights" was published in 1847 under the pseudonym "Ellis Bell"; Brontë died the following year, aged 30.
 "Wuthering Heights" and Anne Brontë's "Agnes Grey" were accepted by publisher Thomas Newby before the success of their sister Charlotte's novel, "Jane Eyre".
 After Emily's death, Charlotte edited the manuscript of "Wuthering Heights", and arranged for the edited version to be published as a posthumous second edition in 1850.
Ponden Hall is a farmhouse near Stanbury in West Yorkshire, England.
 It is famous for reputedly being the inspiration for Thrushcross Grange, the home of the Linton family, Edgar, Isabella, and Cathy, in Emily Brontë's novel "Wuthering Heights".
 However, it does not match the description given in the novel and is closer in size and appearance to the farmhouse of Wuthering Heights itself.
Catherine Linton (also known as "Young Catherine" or Cathy Linton and later as Catherine Heathcliff then as Catherine Earnshaw) is a character in Emily Brontë's novel "Wuthering Heights".
 She is the daughter of Edgar Linton and Cathy Earnshaw, and, despite Heathcliff's attempts at exacting revenge on her for the indiscretions of her family, she eventually marries her true love, Hareton Earnshaw, re-establishing long-lost equilibrium in the story.
Isabella Linton is a fictional character in Emily Brontë's novel "Wuthering Heights".
 She is the sister of Edgar Linton and the wife of Heathcliff.
Hareton Earnshaw is a character in Emily Brontë's novel "Wuthering Heights".
 He is the son of Hindley Earnshaw and Hindley's wife, Frances.
 At the end of the novel, he makes plans to wed Catherine Linton, with whom he falls in love.
Wuthering Heights is a 1970 film directed by Robert Fuest.
 It is based on the classic Emily Brontë novel of the same name.
 Like the 1939 version, this film depicts only the first sixteen chapters concluding with Catherine Earnshaw Linton's death and omits the trials of her daughter, Hindley's son, and Heathcliff's son.
Edgar Linton is a fictional character in Emily Brontë's novel "Wuthering Heights".
 His role in the story is that of Catherine Earnshaw's husband.
 He resides at Thrushcross Grange and falls prey to Heathcliff's schemes for revenge against his family.