The J. Paul Getty Museum
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The J. Paul Getty Museum: image dedicated to the public domain under Creative Commons Zero (CC0), stated on the media record itself ('Rights for Media'), with download clearance.
Hermann Carl Eduard Biewend. My Helene, On her Lap Little Mathilda Asleep, and Close By, Our Two Other Children, Robert and Little Louise, June 22, 1851. The J. Paul Getty Museum.