The picture looks like an etching, it's got an English title, "Lost", but I can't make out the signature (click on image for larger version). My guess is that it's from the first half of the 1900's, but I'm no art expert. If you are, or if you're able to interpret the signature, please leave a comment. If you're not an art expert you're welcome to leave a comment anyway :-)
I also found a painting on the same shopping trip. Stay tuned.