I have a hundred things to say both for and against Knox. I wish from my heart that you, with Mr. Barbauld's assistance, would write a criticism on him. His great fault, I think, is setting out with too confined a view of the ends of education, which must be as various as situations and characters in life are. Does he not breed them all for clergymen and schoolmasters? I should like a good comment on that excellent saying of Agesilaus, "that the great business of education should be to instruct youth in what will be of use to them when they come to be men." This plan will scarcely include Latin verses and the study of Greek dialects.