For many years the Congress has felt the need for a handy, concise guide to the interpretation of the Constitution. An edition of the Constitution issued in 1913 as Senate Document 12, 63d Congress, took a step in this direction by supplying under each clause, a citation of Supreme Court decisions thereunder. This was obviously of limited usefulness, leaving the reader, as it did, to an examination of cases for any specific information. In 1921 the matter received further consideration. Senate Resolution 151 authorized preparation of a volume to contain the Constitution and its amendments, to January 1, 1923 "with citations to the cases of the Supreme Court of the United States construing its several provisions." This was issued as Senate Document 96 of the 67th Congress, and was followed the next year by a similar volume annotating the cases through the October 1923 Term of the Supreme Court. (Senate Document 154, 68th Congress.) Both of these volumes went somewhat beyond the mere enumeration of cases, carrying under the particular provisions of the Constitution a brief statement of the point involved in the principal cases cited. Thirteen years of Constitutional developments led Congress in 1936 to authorize a revision of the 1924 volume, and under authority of Senate Concurrent Resolution 35 introduced by Senator Ashurst, Chairman of the Judiciary Committee, such a revision was prepared in the Legislative Reference Service and issued as Senate Document 232, 74th Congress. This volume was, like its predecessors, dedicated to the need felt by Members for a convenient ready-reference manual. However, so extensive and important had been the judicial interpretation of the Constitution in the interim that a very much larger volume was the result. After another decade, in the course of which many of the earlier interpretations were reviewed and modified, the Senate again moved for a revision of the Annotations. Senate Joint Resolution 69 introduced by the then Chairman of the Judiciary Committee, Senator Alexander Wiley, again called upon the Library of Congress to undertake the work. The confidence thus implied was most thoroughly appreciated. To meet his responsibilities, the Librarian called upon Dr. Edward S. Corwin to head the project. The collaborating staff, supplied by the Legislative Reference Service, included Dr. Norman J. Small as assistant editor, Miss Mary Louise Ramsey, and Robert J. Harris. This time, more than ever, the compilers faced a difficult task in balancing the prime requirement of a thorough and adequate annotation against the very practical desire to keep the results within convenient compass. Work on the project was delayed until funds were made available. In consequence the annotations have been extended to a somewhat later date, covering decisions of the Supreme Court through June 30, 1952. Ernest S. Griffith, _Director, Legislative Reference Service._ EDITOR'S FOREWORD