See this free ebook:

  • The Conversion of Marie-Alphonse Ratisbonne: Original Narrative of Baron Theodore de Bussieres; Followed by a Letter from Mr. Ratisbonne to Rev. Mr. Dufriche-Desgenettes, Cure of Notre Dame des Victoires at Paris, edited by the Rev. W. Lockhart (New York: T.W. Strong). With an 1842 declaration. Available in various formats at Internet Archive and Open Library.

On the Feast of Our Lady of the Miraculous Medal.