Mr. Mann, I think, is still called a whig, but no member of the free soil party has more readily or more ably stood up against the extension of slavery. His noble words stand in marvellous contrast to the discourse of the representative from Boston. Mr. Mann represents the country, and not the "metropolis." His speech last February, and his recent letter to his constituents, are too well known, and too justly prized, to require any commendation here. But I cannot fail to make a remark on a passage in the letter. He says, if we allow Mr. Clay's compromise to be accepted, "Were it not for the horrible consequences which it would involve, a roar of laughter, like a _feu de joie_, would run down the course of the ages." He afterwards says--"Should the South succeed in their present attempt upon the territories, they will impatiently await the retirement of General Taylor from the executive chair to add the 'State of Cuba' ... to this noble triumph." One is a little inclined to start such a laugh himself at the idea of the South waiting for that event before they undertake that plan! Mr. Mann says: "If no moral or religious obligation existed against holding slaves, would not many of those opulent and respectable gentlemen who signed the letter of thanks to Mr. Webster, and hundreds of others, indeed, instead of applying to intelligence offices for domestics, go at once to the auction room, and buy a man or a woman with as little hesitancy or compunction as they now send to Brighton for beeves?" This remark has drawn on him some censures not at all merited. There are men enough in Boston, who have no objection to slavery. I know such men, who would have been glad if slavery had been continued here. Are Boston merchants unwilling to take mortgages on plantations and negroes? Do northern men not acquire negroes by marrying wealthy women at the South, and keep the negroes as slaves? If the truth could be known, I think it would appear that Dr. Palfrey had lost more reputation in Boston than he gained, by emancipating the human beings which fell to his lot. But here is a story which I take from the Boston Republican. It is worth preserving as a monument of the morals of Boston in 1850, and may be worth preserving at the end of the century:--