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![Sir Joseph Dalton Hooker. Photograph by Lock & Whitfield.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djcHM3ZWc4bm4taW1hZ2UuanBn.jpg)
Sir Joseph Dalton Hooker. Photograph by Lock & Whitfield.
Sir Joseph Dalton Hooker. Photograph by Lock & Whitfield.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use