https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14005756Edit ImageSaveSaveEditCropCustom TextA ghost emerging from a hole in the ground; fish, sirens and a frog with a crown in the border. Etching by C.H. Schmidt-Helmbrechts, 1893.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 951 x 1200 px | 300 dpiLarge JPEG 2362 x 2981 px | 300 dpiFree DownloadA ghost emerging from a hole in the ground; fish, sirens and a frog with a crown in the border. Etching by C.H. Schmidt-Helmbrechts, 1893.More