I'm not sure what exactly a circuit court is. I need to learn more. What is a circuit court?
A circuit court is when judges travel to different places and understand cases in a region.
Okay, I think I understand. What kind of cases do they do? 
I'm not exactly sure but I find it fascinating that Abraham Lincoln was an attorney who rode the court in Illinois!
Oh did he? I didn't know that. Were any other famous historical figures circuit court judges or attorneys?
Not that I'm aware of, but King Henry II came up with the idea of circuit court and having judges right to hear cases.
I see. So it's a pretty old system in history then? I'm just trying to remember if I've ever known anyone who was involved in a circuit court case.
I can't think of any but Archibald Cox Jr. was a lawyer who served under John F. Kennedy.