Emélie Sagée's Companion (sources)
- "Why a Livonian School-Teacher Lost her Situation," section in Footfalls on the Boundary of Another World, by Robert Dale Owen, 1861. Pgs. 348-357. Online: https://books.google.com/books?id=4SgCAAAAQAAJ&pg=PA355&lpg=PA355&dq=%22Mademoiselle+de+Guldenstubbe%22&source=bl&ots=iDpYsnerpu&sig=ACfU3U1TTVzqhIZYqmOFpcFwXYp26qu0Iw&hl=en&sa=X&ved=2ahUKEwi7-dmD1PHjAhUFsJ4KHXenBvsQ6AEwAXoECAkQAQ#v=onepage&q=%22Mademoiselle%20de%20Guldenstubbe%22&f=false
- "Livonia," page in the Wikipedia website, viewed 8-7-2019. Online: https://en.wikipedia.org/wiki/Livonia
- "Valmiera," page in the Wikipedia website, viewed 8-7-2019. Online: https://en.wikipedia.org/wiki/Valmiera
- "Habitual Apparition," aricle in Light, Vol. III, No. 137, Saturday, August 18, 1883, London, England. Pg. 366-368. Online: https://books.google.com/books?id=IBYi0x6VRbIC&printsec=frontcover&dq=editions:Em0XEc4_9U0C&hl=en&sa=X&ved=0ahUKEwjlkODD9O3jAhXEv54KHbgcAlIQuwUINDAC#v=onepage&q=livonia&f=false
- "Robert Dale Owen," page in the Wikipedia website, viewed 8/6/2019. Online: https://en.wikipedia.org/wiki/Robert_Dale_Owen
- "Guldenstubbe, Baron L(udwig) von (1820-1873)," page in the Encyclopedia.com website, viewed 8-7-2019. Online: https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/guldenstubbe-baron-ludwig-von1820-1873
- Animisme et Spiritisme [Animism and Spiritualism], by Aleksandr Aksakov [aka Alexander Aksakof], in French, 1906 Paris, France. This is just a French translation of the Light's version of the account. Pg. 498-499. Online [in French]: https://gallica.bnf.fr/ark:/12148/bpt6k54891892/f540.item.r=livonia
- After Death -- What?, by Cesare Lombroso, 1909 Boston, Massachusetts, USA. Pg. 252-253. Online: https://books.google.com/books?id=sYxbAAAAMAAJ&pg=PA252&dq=%22madame+sage%22+livonia&hl=en&sa=X&ved=0ahUKEwj4p5bvp-3jAhWOqZ4KHV_5B14Q6AEIKDAA#v=onepage&q=%22madame%20sage%22%20livonia&f=false
- Strange Stories, Amazing Facts, by Reader's Digest, 1976 USA. ISBN: 0-89577-028-8. Pg. 391.