We have now given a general glance at the _matériel_ of those volumes. They contain a great variety of public documents, valuable to the future historian, though too _official_ for the general reader. One, however, is too curious to be altogether passed by: it is from Lord Brougham, (dated 1812,) offering himself for employment in American affairs:-- "MY LORD,--I am confident that the step which I am now taking cannot be misconstrued by your lordship. Under the present circumstances, I beg to make a tender of my services to his Majesty's government in the conduct of the negotiation with the United States, wheresoever the same may be carried on. "I am induced to think that I might be of use as a negotiator in this affair. I trust it is unnecessary to add, that I can have no motive of a private or personal nature in making this offer. Should it be accepted, I must necessarily sustain a considerable injury in my professional pursuits," &c. We think that, in giving these volumes to the country, the present Marquis of Londonderry has not merely fulfilled an honourable fraternal duty, but has rendered a service to public character. Faction had calumniated Lord Castlereagh throughout a large portion of his career. The man who breaks down a fierce rebellion, and who extinguishes a worthless legislature, must be prepared to encounter the hostility of all whose crimes he has punished, or whose traffic he has put to shame. The felon naturally hates the hand which holds the scales of justice, and, if he cannot strike, is sure to malign. The contemptuous dignity with which Lord Castlereagh looked down upon his libellers, and his equally contemptuous disregard of defence, of course only rendered libel more inveterate; and every low artifice of falsehood was exerted against the administration of a man who was an honour to Ireland.