I asked Doctor Georges Dumas, Professor at the Sorbonne, whether sufficient material exists for science to make a retrospective diagnosis of Jeanne's case.

He replied to my inquiry in a letter which appears as the first Appendix to this work.[79] [Footnote 78: Briere de Boismont, _De l'hallucination historique, ou etude medico-psychique sur les voix et les revelations de Jeanne d'Arc_, 1861, in 8vo.

Le Vicomte de Mouchy, _Jeanne d'Arc, etude historique et psychologique_, Montpellier, 1868, in 8vo, 67 pp.] [Footnote 79: Vol.

ii, Appendix i.] With such a subject I am not qualified to deal.

But it does lie within my province to make an observation concerning the hallucinations of Jeanne d'Arc, which has been suggested to me by a study of the documents.