I found this piece of art at an antique store the other day. While I am sure that it couldn't have been 1889 that this was done, but instead 1989....it is so interesting! Shelf mushrooms have been used as canvases for thousands of years. I looked up the process to doing this type of art, and it is a very immediate piece of work. You pick the fungi, and etch into it with a sharp stick, quill, or other instrument. Work quickly, before it gets too stiff! When it dries, the scratches in the surface will darken and look just like ink!