The multiplication of American reports makes judicial precedents of decreasing value to the American lawyer. English cases are cited as authority far less frequently than they were before the middle of the nineteenth century. The omnipotence of Parliament and the free hand with which that has been exerted to change the common law have tended to separate English from American jurisprudence. Our written Constitutions have perpetuated here ideas of government and property which England does not recognize. Hence American precedents are of more use than English. But American precedents are becoming so numerous that the advocate who seeks to avail himself of them is tempted to cite too many and to examine them with too little care. In each State its own reports are the expression of its ultimate law. With these every member of its bar must be familiar. But the courts before which he argues listen to him with more satisfaction and greater benefit if he deals with the principles of law rather than with foreign precedents which may or may not correctly apply them.[Footnote: See a valuable statistical article on "Reports and Citations" in _Law Notes_ for August, 1904.] Not every opinion which is delivered is officially reported. In most States the court has and exercises the power of directing that such as they may deem of no substantial value to the profession at large shall not be. Many are simply applications of familiar rules which obviously control. Opinions of that kind interest only the lawyers in the cause. In the unofficial reports, however, such cases are sure to appear and the bar is divided in opinion as to whether they should not also be given a place in the official ones. It is not always easy for the court or the reporter to determine what decision may thereafter be relied on as a precedent. Repeated instances have occurred in which such a use has in fact been made and properly made of some not noted in the regular reports, and not infrequently they have subsequently been inserted in them.[Footnote: In the centennial volume (Vol. CXXXI) of those of the Supreme Court of the United States, one hundred and twelve opinions are printed, the first delivered over fifty years before, which previous reporters had thought best to omit, and two hundred and twenty-one more such are published in Vol. CLIV. Whoever runs them over will be apt to think that the previous reporters were right.] There is also in case of an opinion not to be officially reported a loss of a valuable safeguard against unsound decisions. A judge writes with more care and examines the points of law which may be presented more closely if he writes for the public and for posterity.