Vol. I [Bernhard Tauchnitz, 1860] ( p. 194 https://books.google.com/books?id=wUN2KP79lhUC&pg=PA194)
Also in The Cambridge Companion to Sensation Fiction edited by Andrew Mangham [Cambridge University Press, 2013, ISBN 1-107-51169-0] ( p. 82 https://books.google.com/books?id=rQZCAQAAQBAJ&pg=PA82)
The King of Inventors: A Life of Wilkie Collins by Catherine Peters [Princeton University Press, 2014, ISBN 1-400-86345-7] ( p. 224 https://books.google.com/books?id=T0AABAAAQBAJ&pg=PA224)
Cemetery of the Murdered Daughters: Feminism, History, and Ingeborg Bachmann by Sara Lennox [University of Massachusetts Press, 2006, ISBN 1-558-49552-5] ( p. 227 https://books.google.com/books?id=_9VjDtk5ss4C&pg=PA227)
The Law and the Lady (1875)