Is the graph connected? I think it might be interesting to show two well known people who can't be connected in this method.

Creator here – everyone on the site right now is connected, and you can imagine how everyone living today could be added with photos that already exist! The really interesting cases are the historic outliers – like Harriet Tubman, Edgar Allan Poe – who were photographed with others but still can’t be linked into the main graph from anything I’ve found so far. I’m working on a write-up about these “most wanted” isolates.

I was wondering about some of those people of whom supposedly only a very few photos exist (like Thomas Pynchon). Presumably though they could just exclude those people from the list.