https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13973668Edit ImageSaveSaveEditCropCustom TextBoring operation to connect the drainage system near Grays Inn Lane to the main sewage system. Wood engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1001 px | 300 dpiLarge JPEG 2936 x 2448 px | 300 dpiFree DownloadBoring operation to connect the drainage system near Grays Inn Lane to the main sewage system. Wood engraving.More