It is fortunate for the lecturer that there is no necessity for variety. The oft-repeated lecture is new to each new audience, and, being thoroughly in hand, and entirely familiar, is delivered with better effect than if the speaker were frequently choosing from a well-furnished repertory. It is popularly supposed that a lecturer loses all interest in a performance which he repeats so many times. This supposition is correct, in certain aspects of the matter, but not in any sense which detracts from his power to make it interesting to others. It is the general experience of lecturers, that, until they have delivered a discourse from ten to twenty times, they are themselves unable to measure its power; so that a performance which is offered at first timidly and with many doubts comes at length to be delivered confidently, and with measurable certainty of acceptance and success. The grand interest of a lecturer is in his new audience, in his experiment on an assembly of fresh minds. The lecture itself is regarded only as an instrument by which a desirable and important result is to be achieved; and familiarity with it, and steady use in its elocutionary handling, are conditions of the best success. Having selected the subject which, at the time, and for the times, he considers freshest and most fruitful, and with thorough care written out all he has to say upon it, there is no call for recurrence to minor themes, either as regards the credit of the lecturer or the best interests of those whom he addresses.