Several of the following essays are nothing more than compilations. Indeed, a hostile critic might assert that I had used the scissors with the energy of Mr. Timbs and without his discretion. The reader, however, will probably agree with me that I have done wisely in putting before him the opinions of great writers in their own language. Where I am simply acting as reporter, the author’s own way of expressing himself is obviously the best; and if, following the example of the gipsies and Sir Fretful Plagiary, I had disfigured other people’s offspring to make them pass for my own, success would have been fatal to the purpose I have steadily kept in view. The sources of original ideas in any subject, as the student is well aware, are few, but for irrigation we require troughs as well as water-springs, and these essays are intended to serve in the humbler capacity. A word about the incomplete handling of my subjects. I have not attempted to treat any subject completely, or even with anything like completeness. In giving a sketch of the opinions of an author one of two methods must be adopted; we may give an epitome of all that he has said, or by confining ourselves to his more valuable and characteristic opinions, may gain space to give these fully. As I detest epitomes, I have adopted the latter method exclusively, but I may sometimes have failed in selecting an author’s most characteristic principles; and probably no two readers of a book would entirely agree as to what was most valuable in it: so my account must remain, after all, but a poor substitute for the author himself. For the part of a critic I have at least one qualification—practical acquaintance with the subject. As boy or master, I have been connected with no less than eleven schools, and my perception of the blunders of other teachers is derived mainly from the remembrance of my own. Some of my mistakes have been brought home to me by reading works on education, even those with which I do not in the main agree. Perhaps there are teachers who on looking through the following pages may meet with a similar experience. Had the essays been written in the order in which they stand, a good deal of repetition might have been avoided, but this repetition has at least the advantage of bringing out points which seem to me important; and as no one will read the book as carefully as I have done, I hope no one will be so much alive to this and other blemishes in it. I much regret that in a work which is nothing if it is not practically useful, I have so often neglected to mark the exact place from which quotations are taken. I have myself paid the penalty of this carelessness in the trouble it has cost me to verify passages which seemed inaccurate.