You'd have very short or nonexistent list of registered blacks and a very long list of unregistered. And you'd analyze those to try to find out why those statistics existed. And so you could see answers from the whites in different handwritings that you knew were not their handwriting. You'd find that pattern in practice and then you'd go into court and get an injunction against that practice and get them registered.
Several questions come to mind.
First, this was dangerous business for a young black attorney. There were physical threats. I was anxious all the time, and there were threats and some violence. And it was that kind of thing. But that was the only actual physical violence.