Bookmarking within a story

I am aware of how to bookmark a story, that is pretty basic and I'm fairly literate computer speaking. However, some of these stories very, very long indeed. Julie O (who is whom I am reading) has very long stories, but she puts chapters in them (thank you). I jot the chapter down I am about to read when I put it up.

Is there a way to mark where I am within the story when there aren't chapter numbers? I also like it when the chapters are actually broken up, but I understand this is a hassle. If there is a way to go within a website and put it back in that location I would appreciate the heads up. Thanks.