I am less annoyed with myself than when I wrote the "Old Comment", but not wholly content. How is one to write a comment? For whom? One has more than the difficulties of the lexicographer. Each new Postulant presents new problems; the degrees and kinds of their ignorance are no less numerous than they. I am always finding myself, sailing along joyously for several months in the belief that my teaching is helping somebody, suddenly awakened to the fact that I have made noway whatever, owing to the object of my solicitude having omitted to learn that Julius Caesar conquered Gaul, or something of the sort, which I had assumed to be a matter of universal Knowledge.