And, _first_, what may we expect from him against _Slavery_? Will he promote all constitutional measures for its overthrow? Clearly one of these is the Abolition of Slavery in the District of Columbia. This is within the constitutional powers of Congress, and has been called for expressly by our State. It has sometimes occurred to me that Slavery in our country is like the image in Nebuchadnezzar's dream, whose feet of clay are in the District of Columbia, where they may be shivered by Congressional legislation, directed by an enlightened Northern sentiment, so that the whole image shall tumble to the earth. Other measures against Slavery are sanctioned by the Massachusetts Whigs, and by the Legislature of our State, in formal resolutions, duly transmitted to Washington. I have never heard of Mr. Winthrop's voice for any of these,--nor, judging by the past, have I any reason to believe that he will support them earnestly. On these important points he fails, if tried by Whig standards. Will he oppose, at all times, without compromise, any further addition of slaveholding States? Here again, if we judge him by the past, he is wanting. None can forget that in 1845, on the Fourth of July, a day ever sacred to memories of Freedom, in a speech at Faneuil Hall, he volunteered, in advance of any other Northern Whig, to receive Texas with a welcome into the family of States, although on that very day she was preparing a Constitution placing Slavery beyond the reach of legislative change. The conclusion is irresistible, that Mr. Winthrop cannot fitly represent the feeling palpitating in Massachusetts bosoms, and so often expressed by our Legislature, with regard to Slavery.