Isaac Barrow. Line engraving by D. Loggan after himself, 1676. https://www.rawpixel.com/image/13983613/isaac-barrow-line-engraving-loggan-after-himself-1676Free Image from public domain licenseRivierlandschap met een aanlegsteiger met boten (1630 - 1676) by Hendrick Jacobsz Dubbels https://www.rawpixel.com/image/13780922/image-paper-frame-skyFree Image from public domain licenseIsaac Barrow. Line engraving by D. Loggan after himself, 1676. https://www.rawpixel.com/image/14018773/isaac-barrow-line-engraving-loggan-after-himself-1676Free Image from public domain license