In working according to this method, my princi pal dangers are two. I am in danger of not fully apprehending the principles on which society in the United States is founded; and of erring in the application to these of the facts which came under my notlce. In the last respect, I am utterly hope less of my own accuracy. It is in the highest de gree improbable that my scanty gleanings in the wide field of American society should present a precisely fair sample of the whole. I can only explain that I have spared no pains to discover the truth, in both divisions of my task; and invite cor rection, in all errors of fact. This I earnestly do; holding myself, of course, an equal judge with others on matters of Opinion.