In fact, any trouble that may arise from the lay control of a body of expert workers lies just here--in the failure either of the controlling authority or the trained subordinates to recognize and keep within their limitations. It should be the function of the supreme lay authority to decide what results it wants and then to see that it gets them--to call attention to any deviation from them and to replace those who cannot achieve them by others who can. It should be the part of the expert staff of subordinates to discover by what methods these results can best be reached and then to follow out these methods. When the lay head attempts to direct the details of method, or when the trained subordinate thinks it his duty to influence the policy of the institution, then there is apt to be trouble. Such results are apt to follow, on the one hand, the inclusion in a board of trustees of a man with a passion for detail and a great personal interest in the work under him, but without a keen realization of the necessity for strict organization and discipline in his expert staff; or, on the other hand, from the presence in that staff of a masterful man who cannot rest until he is in virtual control of whatever he concerns himself about. I say trouble is _apt_ to follow in such cases. It does not always follow, for the organization may adapt itself to circumstances. The interested trustee may play with ease his two roles, fitting into his board as a lay member and becoming practically also a part of the expert staff. The masterful subordinate may dominate his board so as to become its dictator, and thus do away for a time with his lay control. We have all seen both these things happen, not only in libraries, but in banks, in hospitals, in charitable institutions. In some cases it has been well that they have happened. But although an occasional stick is flexible enough to be tied into a knot, it would be hazardous to try the experiment with all sticks. Some may bend but more will break. Is it not better to accept frankly the division of labor that seems to have been pointed out by the development of our institutions for the guidance of their management? Boards of trustees in this case would find it necessary to decide first on the desirable results to be reached in their work. This is a phase of library discussion that has been somewhat neglected. What is the public library trying to get at? Not stated in vague terms, but in concrete form, so that the trustees can call the librarian to account if he fails to accomplish it? It is only fair to the librarian that he should be informed at the outset precisely what he is expected to do, and then it is only fair that he should be left to do it in his own way.