https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13985209Edit ImageSaveSaveEditCropCustom TextTwo boys sitting together, one holding a stick and looking at the picture book that his brother is holding. Engraving by Robert Wallis after Vogel.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 910 px | 300 dpiLarge JPEG 3192 x 2420 px | 300 dpiFree DownloadTwo boys sitting together, one holding a stick and looking at the picture book that his brother is holding. Engraving by Robert Wallis after Vogel.More