Author talk:Helen Catherine Douglas Mackenzie

Biographical sources
- AdamBMorgan (talk) 14:01, 22 April 2014 (UTC)
 * Mentioned in DNB entry fro her husband (see "About" section). Noted as surviving him (his death: 1881).
 * History of the Mackenzies (Internet Archive link), 1894, by Alexander Mackenzie, p. 540. Mentions Helen briefly; again, in the context of her husband.  Mentions his death but not hers.  Does include her middle name (Catherine), however.
 * Her biography of her husband was published in 1884, implying she was alive at this time (no note in book that she had died).