imposes the sacred duty on educators to watch over their charges, and to remove, as far as lies in their power, all that endangers their morality. The Christian educator fears lest any neglect in this matter may draw upon him the dreadful words addressed to the "watchman to the house of Israel": "If thou declare it not to him [the wicked man], nor speak to him, that he may be converted from his wicked way and live: the same wicked man shall die in his iniquity, but I will require his blood at thy hand."[1] Indeed, it is the fatherly love and care for the welfare of their pupils which leads the Christian educator to exercise supervision over his pupils. He has received from the parents that treasure which is to them more precious than anything on earth; their own dearly beloved children, for whom they toil and labor, over whom they anxiously watch and pray lest they should suffer shipwreck in regard to their faith and virtue, especially the virtue of purity which is so beautiful, so priceless, and yet so difficult of securing in youth. The teacher would be guilty of the basest breach of confidence, did he not strain every nerve to avert a calamity from those so sacredly entrusted to him. We can well understand that at times this or that particular method may justly be censured, as, in reality, not being conducive to the end which is sought; but that the whole system, the very principle, should be ridiculed and condemned, spoken of in terms of invective and indignation, and stigmatized by such opprobrious names as "espionage" and the like – this, we say, is startling.[2] It can be explained only