This kept coming up over at Quora, so I am linking to my several posts about William Sidis, from 2011. Many of you are in the comments, and James figures prominently. As this is multiple posts, I will let it cover a few days.
I no longer get notifications from Quora, and I am relieved. I kept nibbling back in, even though I told myself I was going to quit. I think I marked their email notification as spam by mistake, and haven't heard from them since.