On two different occasions his views have been put forth and developed,--first, in elaborate controversy with Mr. Douglas in Illinois, and, secondly, in his well-known speech at the Cooper Institute, New York. He does not need my praise; nor would I step aside from my argument to praise anybody; but I may fitly call attention to this masterly address, which, in careful research, clearness of statement, and directness of purpose, may well compare with any one of the innumerable speeches ever made concerning the power of Congress over the Territories. On the topic it professes to treat it is a monograph. Perhaps it is not too much to say that the effort was needed in establishing his title to that public confidence which made him our candidate. It is for the Prohibition of Slavery in the Territories that he has labored, and, excepting his brief, but honorable, experience in Congress, his public life may be summed up in this single service,--nor more nor less. The magnitude of the service may be measured by his present position as representative of our cause. * * * * * Arrayed in opposition are three other candidates for the Presidency,--Bell, Breckinridge, and Douglas,--I mention them in alphabetical order,--differing superficially among themselves, but all concurring in friendship for Slavery and in withstanding its prohibition anywhere, with followers ready, in warfare against the Republican party, to coalesce or fuse with each other. In this readiness you see the common antagonism. No person in the Republican party can think of coalition or fusion with either of these three parties; for they each and all represent in some form resistance to the Prohibition of Slavery, and therefore must be opposed, each and all. The whole trio are no better than Mrs. Malaprop’s idea of Cerberus, “three gentlemen at once,” and must be encountered together. * * * * *