The fonds present extremely rich source for the study of Montreal and Quebec social and legal history. The fonds (mainly 1820-1890) comprises of judicial diaries or judges' bench books, which contain unique information: the opinions and memoranda of judges and lawyers of the Lower Canada and the Quebec Superior Court written down in the course of trials. They reflect the judge's interpretation of the law, his reaction to arguments and they show the background to official verdicts. The fonds contain bench books of Judges Robert Mackay (1871-1882), Andrew Stuart (1859-1885), Frederick Torrance (1869-1880). There are also record books of several law firms including Rose and Holmes (1840-1850), and Torrance and Morris (1850-1875). Included is also administrative correspondence, factums on various Montreal judges and lawyers, dockets and other records of law firms, legal authority books, commonplace books and other notes of individual lawyers. Present is also small number of lecture notes by lecturers in the Faculty of Law, student notes, scrapbooks as well as legal notes of unknown provenance. The bench books are in bound volume arranged in chronological order, the correspondence and authorities books are arranged by name or subject. There are contemporary indexes to the bench books of F. Torrance and R. Mackay.