MR. WILBERFORCE has not been over-estimated, but, in my judgment, he has been mis-estimated. Entitled to less relative praise for his Abolition services than is generally bestowed, he is worthy of a higher position as a statesman and orator than is usually assigned to him. This common error is readily accounted for. The commanding place he so long occupied, as the Parliamentary leader in this Reform, rendered him more conspicuous at home, and especially abroad, than any of his coadjutors, though no man was more ready than he to acknowledge that his services were meager, compared with those of some of his less noted colaborers. So, on the other hand, such is the luster of Mr. Wilberforce's undoubted achievements in the Abolition cause, that to the public eye they have thrown into the shade his very superior talents in other and more general aspects. He would have stood in the front rank of Parliamentary orators, (and those were the days of Burke, Fox, Pitt, Erskine, Wyndham, and Sheridan,) had he never thrown a halo round his name by consecrating his powers to humanity. Thoroughly educated, and furnished with general information, his eloquence was of a high order--fervid, instructive, persuasive; his diction classical and elegant; his voice musical and bland; and though his figure was diminutive, and not graceful, his countenance was remarkably expressive. He possessed a lively imagination, a keen sense of the ludicrous, a ready wit, and powers of sarcasm which Pitt might envy. These latter, however, he kept in subjection, mainly from his strong religious susceptibilities and kindly spirit, which impelled him to avoid giving pain, choosing to disarm personal assailants by winning appeals to their calmer judgments. On one occasion, after being repeatedly and coarsely alluded to, as "the honorable and very religious member," he turned upon his antagonist, and poured upon him a torrent of contempt, sarcasm, and rebuke, which astonished the House, not more for the ability it displayed, than that so great a master of indignant declamation should so rarely resort to its use. These intellectual elements combined with the spotless purity and winning beauty of his character, to give him great weight in the House, and contributed not a little to sustain the general policy of Mr. Pitt, whose supporter he usually was, though he ever maintained a position of comparative political independence. He had much personal influence over that minister, whose repeated offers to take office under his Administration he steadily declined. He retired from Parliament in 1824. His last public appearance was in 1830, when, on motion of his old friend Clarkson, he took the chair at a large meeting of delegates, in London, assembled to promote the abolition of slavery in the West Indies.