Proctor is a person who takes charge of, or acts for, another.
Proctor of the University of Cambridge, aquatint by John Samuel Agar after Thomas Uwins, from History of the University of Cambridge (1815) by William Combe
1674 engraving of a Proctor in the University of Oxford. From Habitus Academicorum, by George Edwards.
Doctors' Commons, also called the College of Civilians, was a society of lawyers practising civil law in London, namely ecclesiastical and admiralty law. Like the Inns of Court of the common lawyers, the society had buildings with rooms where its members lived and worked, and a large library.
Doctors' Commons in the early 19th century.
The Prerogative Office, Doctors' Commons, in 1860
This plaque is located on the Faraday Building on the north side of Queen Victoria Street and marks the site of the now demolished Doctors' Commons.