https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13959656Edit ImageSaveSaveEditCropCustom TextHans Buling, an itinerant medicine salesman demonstrating his wares with the aid of a monkey. Colour line engraving after M. Laroon.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 812 x 1200 px | 300 dpiLarge JPEG 2200 x 3252 px | 300 dpiFree DownloadHans Buling, an itinerant medicine salesman demonstrating his wares with the aid of a monkey. Colour line engraving after M. Laroon.More