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4. Dunn, William McKee. (1883) Is marriage with a deceased wife's sister lawful? London: Rivingtons waterloo place. https://en.wikisource.org/wiki/Is_Marriage_with_a_Deceased_Wife%27s_Sister_Lawful%3F#:~:text=But%2C%20it%20is%20idle%20to%20talk%20of%20it,forbid%20a%20marriage%20 with%20a%20deceased%20wife%27s%20sister. Accessed 27 Jun 2020.
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