A more thorough explanation:

The College of Advocates and Doctors of Law is an organization that oversees and regulates the legal profession in England. It is also known as the Doctors' Commons.

For example, in the past, lawyers who wanted to practice in certain areas of law, such as maritime law, had to be members of the College of Advocates and Doctors of Law.

This organization was important because it ensured that lawyers had the necessary knowledge and skills to practice in their chosen field. It also helped to maintain high standards of professionalism and ethics among lawyers.