Also, here's a link to a short & spoilery essay on the racist "Matska" character mentioned in the footnotes: https://drive.google.com/file/d/14qe0Pp_jHewqa1CqWJYiBistyJlWK5CG/
Google DocsWhat or Who Is “Matska” in CARMILLA_ -- Guyant, Valerie(University of Wisconsin–Eau Claire) -- The Explicator, #3, 72, pages 185-188, 2014 jul 03.pdf