Mary Burrell, A Dictionary of Music and Musicians (1900)
“ Gifted with a voice combining the resources of soprano and contralto in one—or rather with two voices (wrote one able critic) ; a well-accentuated style of declamation; endowed with a grace which made every attitude a pictorial study, no wonder that Mlle. Johanna Wagner took the house by storm.' In 1859 she married Herr Landrath Jachmann, and two years later had the misfortune to lose her voice suddenly and completely. She then bravely entered upon a second artistic career, as an actress, her very exceptional gifts enabling her to do so with brilliant success. ”
