Dr. Jekyll used to turn into Mr. Hyde. Robert Louis Stevenson told us the story of this in 1886. However, he left out the part of Dr. Jekyll turning into a fly. This story may be your first knowledge of this. Yes, he would take a potion and turn into Mr. Fly. You can see a picture of him on the cover. He had some wonderful adventures as Mr. Fly. Read this story and be thrilled by them!