It means the way things were done in English courts in the 1700's.
Really.
I'm not kidding.
And as far as I can see, there really aren't any better ways to do it. The best means of obtaining justice that have ever been developed are the fossilized barbaric practices of country judges in the homeland of an evil empire during a time of upheaval.
As Sister State (from the Church and State class I took in college, presented by a pair of nuns - Sister Church and Sister State - whose real names I cannot recall) put it, any system that makes sense is probably heretical, and almost certainly very bad for the people involved.