The nobile officium – the equitable jurisdiction of the Supreme Courts of Scotland – has the potential to be of continuing use today. But its scope and limitations are poorly understood. This is the first book to systematically examine the nobile officium. Placing it in its historical and conceptual context, the book explores the development and application of the nobile officium. It covers areas as diverse as trusts; judicial factors, curators, tutors and guardians; bankruptcy, insolvency and sequestration; custody of children; public officers; statutory omissions; civil procedure; and criminal law and procedure.