The end of all eloquence is to sway men. It is, therefore, bound by no arbitrary rules of diction or style, formed on no specific models, and governed by no edicts of self-elected judges. It is true, there are degrees of eloquence, and equal success does not imply equal excellence. That which is adapted to sway the strongest minds of an enlightened age ought to be esteemed the most perfect, and, doubtless, should be the criterion by which to test the abstract excellence of all oratory. Mr. Langston represents the highest idea of the orator, as exemplified in the power and discourses of Sheridan in the English House of Commons, and Vergniaud in the Assembly of the Girondists. He is not fragmentary in his speeches; but, as a deep, majestic stream, he moves steadily onward, pouring forth his rich and harmonious sentences in strains of impassioned eloquence. His style is bold and energetic; full of spirit. He is profound, without being hollow, and ingenious, without being subtile. An accomplished scholar and a good student, he displays in his speeches an amount of literary acquirements not often found in the mere business lawyer. When pleading, he speaks like a man under oath, though without any starched formality of expression. The test of his success is the permanent impression which his speeches leave on the memory. They do not pass away with the excitement of the moment, but remain in the mind, with the lively colors and true proportions of the scenes which they represent. Mr. Langston is of medium size, and of good figure; high and well-formed forehead; eyes full, but not prominent; mild and amiable countenance; modest deportment; strong, musical voice; and wears the air of a gentleman. He is highly respected by men of all classes, and especially, by the legal profession. He is a vigorous writer, and, in the political campaigns, contributes both with speech and pen to the liberal cause. Few men in the south-west have held the black man’s standard higher than John Mercer Langston. As Dean of the Law Department in Howard University, he has won the admiration of all connected with the institution, and, in a recent address, delivered in the State of New York, on law, Mr. Langston has shown that he is well versed in all that pertains to that high profession. JOHN M. BROWN.