Vintage Cat Bookmark: 1919 Emerson Book

I bought this book at a book fair in the spring. It is from 1919, was written by Emerson, and has an interesting green leather cover with Art Nouveau art. My mom is currently reading it and it appears she is the first person in all these years to do so--she has to slice the pages apart with a letter opener! 

That said, someone at least picked it up in the past and slipped a bookmark inside, cause as she was reading it this little guy fell out from the pages! Oh the delights of vintage books!