Line upon Line.—The theme of ‘School-Books’ is not a new one, and I daresay the reader will find that I have said before what I shall say now. But we are not like those men of Athens who met to hear and to tell some new thing; and he will, I know, bear with me because he will recognise how necessary it is to repeat again and again counsels which are like waves beating against the rock of an accepted system of things. But, in time, the waves prevail and the rock wears away; so we go to work with good hope. Let me introduce what I have to say about school-books by a little story from an antiquated source.