I love this for feeling like a magical little secret, and that the paper should be sun yellow is just right. Its survival feels pretty miraculous too--easy to miss that this is anything more than a plain slip of paper. My efforts to photograph the very finely pinpricked design fell a bit short, but details give a sense. It looks to me that there is a figure nestled into the face of this leaf, with face in 3/4 profile, perhaps an acorn hat on his head! This could be sandwiched between two small pieces of glass and hung or propped in a window so as to have sun--or moon--light shining through.

 5 3/4" x 4 3/8". Excellent condition, earlyish 1800s I believe.