The Anti-Slavery Society Convention, 1840, by Benjamin Robert Haydon (died 1846), given to the National Portrait Gallery… https://www.rawpixel.com/image/7666291/image-art-vintage-public-domainFree Image from public domain licenseAn English Country Performance of Macbeth, after William Henry Pyne https://www.rawpixel.com/image/9614094/english-country-performance-macbeth-after-william-henry-pyneFree Image from public domain licenseWilliam Allen, portrayed as an alchemist with several furnaces, the one which he stokes is labelled "Matter o'money".… https://www.rawpixel.com/image/13951809/image-cartoon-person-bookFree Image from public domain licenseA room of Quakers gossiping about the marriage of William Allen to Mrs. Grizell Birkbeck, seen on the left, affirming their… https://www.rawpixel.com/image/13968779/image-paper-cartoon-personFree Image from public domain licenseDistinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13975701/image-person-art-clothingFree Image from public domain licenseAn inn at Bristol: people having breakfast before taking the stage coach. Stipple print after E.V. Rippingille, 1824. https://www.rawpixel.com/image/13977573/image-person-art-clothingFree Image from public domain licenseA room of Quakers gossiping about the marriage of William Allen to Mrs. Grizell Birkbeck, seen on the left, affirming their… https://www.rawpixel.com/image/14005701/image-paper-cartoon-personFree Image from public domain licenseJames Macartney. Stipple engraving by W. T. Fry, 1825, after J. Keenan. https://www.rawpixel.com/image/14006609/james-macartney-stipple-engraving-fry-1825-after-keenanFree Image from public domain licenseWilliam Allen. Line engraving by H. C. Shenton after H. P. Briggs. https://www.rawpixel.com/image/14010978/william-allen-line-engraving-shenton-after-briggsFree Image from public domain licenseJames Macartney. Stipple engraving by W. T. Fry, 1825, after J. Keenan. https://www.rawpixel.com/image/13975587/james-macartney-stipple-engraving-fry-1825-after-keenanFree Image from public domain licenseDistinguished British men of science 1807-1808 assembled in the library of the Royal Institution, London. Mezzotint by W.… https://www.rawpixel.com/image/13981199/image-person-art-clothingFree Image from public domain licenseWilliam Allen. Lithograph by C. Baugniet after T. F. Dicksee. https://www.rawpixel.com/image/13973019/william-allen-lithograph-baugniet-after-dickseeFree Image from public domain licenseWilliam Allen, portrayed as an alchemist with several furnaces, the one which he stokes is labelled "Matter o'money".… https://www.rawpixel.com/image/14019484/image-cartoon-person-bookFree Image from public domain licenseWilliam Allen. Line engraving by H. C. Shenton after H. P. Briggs. https://www.rawpixel.com/image/14006298/william-allen-line-engraving-shenton-after-briggsFree Image from public domain licenseThe distinguished men of science 1807-8: a key to the identities of the sitters. Photograph of engraving by W. Walker, 1862… https://www.rawpixel.com/image/14011458/image-cartoon-face-personFree Image from public domain license