It would be futile to attempt in this brief course of lectures to review the history of the Supreme Court of the United States. What had been lacking in narratives of this sort, in order fully to understand the relation of the Court to the history of our country, has recently been supplied in Mr. Warren's comprehensive volumes. For the student of constitutional law nothing would suffice but a thorough-going analysis of many decisions and an impressionistic treatment would be but vexation. My endeavor will be simply to aid to some extent in the interpretation of an institution which despite its constant and unique service is a mystery, I fear, to most of our people; to assist those, who are not aiming to become legal scholars, to understand something of its origin, of the principles that govern it, of its methods and of the important results of its work. Even with this limitation, much that I should like to say must be omitted.