I did quite a bit of research by Google-ing a lot of the costume websites.
2008, Carol Adams, Douglas Buchanan, Kelly Gesch, quoting Anne Timmons, “Northanger Abbey: The Graphic Novel”, in The Bedside, Bathtub & Armchair Companion to Jane Austen, New York, N.Y., London: The Continuum International Publishing Group, page 92, column 1