Law education in 18th century England
I'm not an English lawyer and my exposure to Cambridge and Middle Temple was brief. Per my previous post, this is just how I understood the English common law education system.
In the US, having a juris doctorate (JD) and passing the Bar examination gives a person the professional title of 'Lawyer'. As a graduate degree, one must have a bachelor's degree in any subject before they can start working towards a JD.
In modern England, the undergraduate degree in law makes someone a lawyer. They enter the field to be either a solicitor or a barrister (barristers argue cases in court and solicitors do everything else). Both have to pass their respective exams before they can formally practice law. Barristers attend an Inn of the Court and continue their education (keeping terms, going to lectures, completing readings, etc) to be "Called to the Bar." In the 18th century, they would've been evaluated by the Inns before being qualified to argue in court.
The Inns are located next to the royal courthouses and barristers live, eat, and study there while practicing law. In the 18th century, The Inns were somewhat like trade guilds for lawyers and they had their own internal governing bodies.
In modern times, a law student would attend a university like Oxford or Cambridge for their law degree before going to one of the Inns, but in the 18th century, gentlemen could be called to the Bar and live at an Inn of the Court without having a formally standardized degree in law as we would think of it today. They would be tradesmen, educated in other relevant areas and they would be trained on some common legal principles while at the Inn.
Here's another helpful article on the evolution of English legal education in the 1760s

















