Alfred Smee. Stipple engraving by C. H. Jeens after H. R. Robertson. https://www.rawpixel.com/image/14002513/alfred-smee-stipple-engraving-jeens-after-robertsonFree Image from public domain licenseElements of electro-biology, or the voltaic mechanism of man; or electro-pathology, especially of the nervous system; and of… https://www.rawpixel.com/image/13979434/image-background-paper-cartoonFree Image from public domain license