A Siberian four toed mantis climbing down a branch of a tree. Coloured etching. https://www.rawpixel.com/image/13959259/siberian-four-toed-mantis-climbing-down-branch-tree-coloured-etchingFree Image from public domain licenseThe Beggar's opera: on trial for robbery, Captain Macheath stands in shackles in Newgate prison, while two of his lovers… https://www.rawpixel.com/image/13981649/image-cartoon-person-artFree Image from public domain licenseA gathering at Joshua Reynolds's house: Oliver Goldsmith and Edmund Burke among the company. Stipple engraving by W. Walker… https://www.rawpixel.com/image/13987874/image-person-art-clothingFree Image from public domain license