At the appointed hour Mr. Webster was completely ready. His argument is thought one of the finest, in every respect, that he has produced. I read it before I knew anything of the circumstances which I have related; and I was made acquainted with them in consequence of my inquiry how a man could be hanged on evidence so apparently insufficient as that adduced by the prosecution. Mr. Webster had made all that could be made of it; his argument was ingenious and close, and imbued with moral beauty; but the fact was, as I was assured, the prisoners were convicted on the ground of the confession of the criminal more than on the evidence adduced by the prosecutors; though the confession could not, after all, be made open use of. The prisoners had such an opinion of the weakness of the case, that Joseph, who had been offered favour by government, refused to testify, and the pledge of the government was withdrawn. Both the Knapps were hanged.

The clearness with which, in this case, a multitude of minute facts is arranged, and the ingenuity with which a long chain of circumstantial evidence is drawn out, can be understood only through a reading of the entire argument. Even these are less remarkable than the sympathy by which the pleader seems to have possessed himself of the emotions, the peculiar moral experience, of the quiet, good people of Salem, when thunderstruck with this event. While shut up at his task, Mr. Webster found means to see into the hearts which were throbbing in all the homes about him. "One thing more," said he to my friend, who was taking his leave of him on the eve of the trial. "Do you know of anything remarkable about any of the jury?" My friend had nothing to say, unless it was that the foreman was a man of a remarkably tender conscience. To this we doubtless owe the concluding passage of the argument, delivered, as I was told, in a voice and manner less solemn than easy and tranquil.

"Gentlemen—Your whole concern should be to do your duty, and leave consequences to take care of themselves. You will receive the law from the court. Your verdict, it is true, may endanger the prisoner's life; but, then, it is to save other lives. If the prisoner's guilt has been shown and proved beyond all reasonable doubt, you will convict him. If such reasonable doubts still remain, you will acquit him. You are the judges of the whole case. You owe a duty to the public as well as to the prisoner at the bar. You cannot presume to be wiser than the law. Your duty is a plain, straightforward one. Doubtless, we would all judge him in mercy. Towards him, as an individual, the law inculcates no hostility; but towards him, if proved to be a murderer, the law, and the oaths you have taken, and public justice, demand that you do your duty.

"With consciences satisfied with the discharge of duty, no consequences can harm you. There is no evil that we cannot face or fly from but the consciousness of duty disregarded.

"A sense of duty pursues us ever. It is omnipresent, like the Deity. If we take to ourselves the wings of the morning, and dwell in the uttermost parts of the seas, duty performed or duty violated is still with us, for our happiness or our misery. If we say the darkness shall cover us, in the darkness as in the light our obligations are yet with us. We cannot escape their power nor fly from their presence. They are with us in this life, will be with us at its close; and in that scene of inconceivable solemnity which lies yet farther onward, we shall still find ourselves surrounded by the consciousness of duty, to pain us wherever it has been violated, and to console us so far as God may have given us grace to perform it."

How must the mention of the tremendous "secret" have thrilled through the hearts of citizens who had for weeks been anxiously searching every man's countenance to find it out. The picture given as from the pleader's imagination was, as every man knew, derived from the confession of the criminal.

"The deed was executed with a degree of self-possession and steadiness equal to the wickedness with which it was planned. The circumstances, now clearly in evidence, spread out the whole scene before us. Deep sleep had fallen on the destined victim and on all beneath his roof. A healthful old man, to whom sleep was sweet, the first sound slumbers of the night held in their soft but strong embrace. The assassin enters through the window, already prepared, into an unoccupied apartment. With noiseless foot he paces the lonely hall, half lighted by the moon; he winds up the ascent of the stairs, and reaches the door of the chamber. Of this he moves the lock, by soft and continued pressure, till it turns on its hinges, and he enters, and beholds his victim before him. The room was uncommonly open to the admission of light. The face of the innocent sleeper was turned from the murderer, and the beams of the moon, resting on the gray locks of his aged temple, showed him where to strike. The fatal blow is given! and the victim passes, without a struggle or a motion, from the repose of sleep to the repose of death! It is the assassin's purpose to make sure work; and he yet plies the dagger, though it was obvious that life had been destroyed by the blow of the bludgeon. He even raises the aged arm, that he may not fail in his aim at the heart, and replaces it again over the wounds of the poniard. To finish the picture, he explores the wrist for the pulse! he feels it, and ascertains that it beats no longer! It is accomplished. The deed is done. He retreats, retraces his steps to the window, passes out through it as he came in, and escapes. He has done the murder; no eye has seen him, no ear heard him. The secret is his own, and it is safe! Ah, gentlemen, that was a dreadful mistake. Such a secret can be safe nowhere. The whole creation of God has neither nook nor corner where the guilty can bestow it and say it is safe. Not to speak of that Eye which glances through all disguises, and beholds everything as in the splendour of noon, such secrets of guilt are never safe from detection, even by men. True it is, generally speaking, that 'murder will out.' True it is that Providence hath so ordained, and doth so govern things, that those who break the great law of Heaven by shedding man's blood seldom succeed in avoiding discovery. Especially, in a case exciting so much attention as this, discovery must come, and will come, sooner or later. A thousand eyes turn at once to explore every man, every thing, every circumstance connected with the time and place; a thousand ears catch every whisper, a thousand excited minds intensely dwell on the scene, shedding all their light, and ready to kindle the slightest circumstance into a blaze of discovery. Meantime, the guilty soul cannot keep its own secret. It is false to itself; or, rather, it feels an irresistible impulse of conscience to be true to itself. It labours under its guilty possession, and knows not what to do with it. The human heart was not made for the residence of such an inhabitant. It finds itself preyed on by a torment which it does not acknowledge to God or man. A vulture is devouring it, and it can ask no sympathy or assistance either from heaven or earth. The secret which the murderer possesses soon comes to possess him; and, like the evil spirits of which we read, it overcomes him, and leads him whithersoever it will. He feels it beating at his heart, rising to his throat, and demanding disclosure. He thinks the whole world sees it in his face, reads it in his eyes, and almost hears its workings in the very silence of his thoughts. It has become his master. It betrays his discretion, it breaks down his courage, it conquers his prudence. When suspicions from without begin to embarrass him, and the net of circumstance to entangle him, the fatal secret struggles with still greater violence to burst forth. It must be confessed; it will be confessed; there is no refuge from confession but suicide; and suicide is confession."

Mr. Webster was born in 1782, in New-Hampshire. His father was a farmer who had retreated into the wilderness, and, as his son says, "had lighted his fire nearer to the North Pole than any other citizen of the States." The good man had, however, come down into the meadows at the foot of the hills before his second son Daniel was born. By the means which are within reach of almost every child in his country—the schools and colleges of easy access—Daniel became qualified for an apprenticeship to law; and by industry, great intellectual power, and some few fortunate accidents, rose into notice, employment, and eminence. He has for some years been considered the head of the federal party, and he is therefore now on the losing side in politics. His last great triumph was his exposure of the nullification doctrine in 1833. Since that time he has maintained his influence in Congress by virtue of his great talents and former services; but, his politics being in opposition to those of the great body of the people, he is unable to do more than head the opposition in the Senate. He was an unsuccessful candidate in the last presidential election; and there seems little probability of his attainment of office, unless by his taking the lead of the abolition movement. For this it is probably now too late. The abolitionists have done the most difficult part of the work in rousing the public mind; they are chiefly of the democratic side in politics; and they do not entertain, I believe, that faith in the great leader of the federalists which would induce them to support his claims as the anti-slavery candidate for the next presidentship.

Mr. Webster owes his rise to the institutions under which he lives; institutions which open the race to the swift and the battle to the strong; but there is little in him that is congenial with them. He is aristocratic in his tastes and habits, and but little republican simplicity is to be recognised in him. Neither his private conversation nor his public transactions usually convey an impression that he is in earnest. When he is so, his power is majestic, irresistible; but his ambition for office, and for the good opinion of those who surround him, is seen too often in alternation with his love of ease and luxury to allow of his being confided in as he is admired. If it had been otherwise, if his moral had equalled his intellectual supremacy, if his aims had been as single as his reason is unclouded, he would long ago have carried all before him, and been the virtual monarch of the United States. But to have expected this would have been unreasonable. The very best men of any society are rarely or never to be found among its eminent statesmen; and it is not fair to look for them in offices which, in the present condition of human affairs, would yield to such no other choice than of speedy failure or protracted martyrdom. Taking great politicians as they are, Mr. Webster's general consistency may be found not to have fallen below the average, though it has not been so remarkable as to ensure on his behalf a confidence at all to be compared with the universal admiration of his talents.

Mr. Webster speaks seldom in the Senate. When he does, it is generally on some constitutional question, where his reasoning powers and knowledge are brought into play, and where his authority is considered so high, that he has the glorious satisfaction of knowing that he is listened to as an oracle by an assemblage of the first men in the country. Previous to such an exercise he may be seen leaning back in his chair, not, as usual, biting the top of his pen, or twirling his thumbs, or bursting into sudden and transient laughter at Colonel Benton's oratorical absurdities, but absent and thoughtful, making notes, and seeing nothing that is before his eyes. When he rises, his voice is moderate and his manner quiet, with the slightest possible mixture of embarrassment; his right hand rests upon his desk, and the left hangs by his side. Before his first head is finished, however, his voice has risen so as to fill the chamber and ring again, and he has fallen into his favourite attitude, with his left hand under his coat-tail, and the right in full action. At this moment the eye rests upon him as upon one under the true inspiration of seeing the invisible and grasping the impalpable. When the vision has passed away, the change is astonishing. He sits at his desk, writing letters or dreaming, so that he does not always discover when the Senate is going to a division. Some one of his party has not seldom to jog his elbow, and tell him that his vote is wanted.