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In page Dolly Haas:

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Her father Charles was half-German, but had grown up in England, and had British citizenship. Dolly and her sister, Margarete, attended Jacob Loewenberg's girls' school Lyzeum in Hamburg, the Anerkannte höhere Mädchenschule.[citation needed][3] The Haas family's personal records, including diaries and letters, are currently held by the Center for Jewish History in New York City, New York.[4]