As to what southern emissaries may do, by throwing information into the hands of the Rebels, of our movements, etc., I have only to say that it is an abstract question that should have no weight with men willing to do their duty in a great crisis like the present; follow this rule of reasoning and we should have no army, no President, no freemen, no free-soil, nor aught else to defend. Seven years ago the serfs of Russia were hopeless slaves; the nobility had frustrated the efforts of every cabinet for the amelioration of their condition. At length a war broke out between Russia, Turkey, France and England. The Czar, driven to an extremity, proposed to place in the field 250,000 serfs. The nobility protested against it, fearing the result to themselves. The serfs opposed it because they could see no issue in the war favorable to their interest; they believed England and France to be far more favorable to their freedom than Russia. The war raged, and finally Alexander, over the heads of nobility and serfs, drafted 75,000 serfs and sent them off to the Crimea, and in less than three years from that time, nearly thirty millions of slaves are freed by the result of that policy. There was no way to dispossess these people of the influence they swayed by that one stroke of war policy; but to emancipate them was inevitable. Is not our condition analogous to theirs in many respects, and may we not by the same policy expect a similar result? I must thank my friend for two considerations of kindness toward his old, misguided, suicidal friend; first, for his anxiety “that I might receive my sight;” second; for his anxiety lest I should be lost while performing an unpleasant duty. There are two kinds of blindness mentioned in scripture, an unfortunate blindness and a wilful one; as my friend has placed me among the first class, by Moses’ law, Leviticus 19: 14, I am entitled to commiseration, and by the same law, Deut. 27: 18, he should be sorely punished for trying to lead me to wander out of the way, etc. I am somewhat fearful that my friend may be of the opposite class mentioned in the ¶ from the 37th to the 52d verse of the 12th chapter of John. If so, a solution to his unfortunate state may be found in Matthew, 15: 14. A. M. GREEN. POPULAR LECTURES. Associations and Lecture Committees will do well, when making engagements for a course, or for single Lectures, to remember that =PROF. A. M. GREEN= is prepared to deliver either of the following VERY POPULAR AND INSTRUCTIVE LECTURES, on the most reasonable terms: LECTURE I. SUBJECT—_Lessons in the School of Mythology_. LECTURE II. SUBJECT—_Slavery, Rebellion, Emancipation_. LECTURE III. SUBJECT—_The Terrific Power of Intemperance when it Becomes a Master Passion_. LECTURE IV. SUBJECT—_The Beauty and Power of a Christian Education; or, Pagan and Christian Literature Contrasted_.