Original Preface to the 1818 Edition (Frankenstein)

In the 2018 anthology (viewed as Amazon "Look inside"; ebook only, no page numbers) the heading of this essay is "Original Preface to the 1818 edition" and its closing matches the original, "Marlow, September, 1877". There it follows the Introduction to the 1831 Edition, whose closing is "M.W.S." over "London, October 15, 1831".

That the 2018 publication is genuinely uncredited may be debated, as it appears in a subsection of the anthology that is credited to Mary Shelley; the Contents list appears designed to identify all of the contributors; the Foreword and Publisher's Note don't mention it. (The closing essay Biographies & Sources is not in this database, and the Amazon "Look" shows no part of it.)