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Madam Schummann-Heink Recital  

Madame Ernestine Schumann-Heink; Her Life and Times by Joseph L. Howard.

A biographical(Wikipedia,) on her

The Ernestine Schumann-Heink: A Contralto’s Legacy Collection is an ongoing project to digitize her music manuscript collection and is made possible by the generous support of Thomas Hampson’s Hampsong Foundation.

In 1938, her personal music collection, which also included newspaper clippings, concert programs, posters, photographs, letters, certificates, radio broadcast scripts and awards, was given by her bequest to Pomona College and is preserved and made available to researchers in Special Collections of The Claremont Colleges Library, Claremont, Californis

Also found is this tib bit:

At any rate one of Aunt Irma's vivid accounts s involves meeting Madam Schuman-Heink (the operatic soprano) whose son went to the Academy while she stayed at The B. Vonnegut Cottage.

In the 'Eighteen Niety-four to Nineteen Ninety-four LAKE MAXINKUCKEE SUMMERS" By Catherine Matilda (Glossbrenner) Rasmussen.