https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14016731![John Stevens Henslow. Wood engraving, 1861, after Maull & Polyblank.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djeGg0bmVwa2MtaW1hZ2UuanBn.jpg)
![John Stevens Henslow. Wood engraving, 1861, after Maull & Polyblank.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djeGg0bmVwa2MtaW1hZ2UuanBn.jpg)
John Stevens Henslow. Wood engraving, 1861, after Maull & Polyblank.
John Stevens Henslow. Wood engraving, 1861, after Maull & Polyblank.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use