Robuta

https://en.wikisource.org/wiki/Author:Samuel_Heinrich_Schwabe Samuel Heinrich Schwabe - Wikisource, the free online library samuel heinrich the free online library schwabe wikisource https://www.philamuseum.org/objects/13940 Caspar Heinrich Merz, Portrait of Samuel Amsler, 1833 (printed 1850) | Philadelphia Museum of Art Prints, Etching and engraving, from 1833 (printed 1850) caspar heinrich merz portrait samuel