SENATOR SEWARD IN MICHIGAN. – The speech of Gov. SEWARD, delivered at Detroit, on the threshold of the Great West, will be found in other columns. The orator, recurring to the early history of Slavery as affiliated with politics, traces its relations with successive partisan organizations; demonstrating that its encroachments commenced with the failure of parties to sustain their leaders in opposing its pretensions, and attained their present inordinate and arrogant proportions through active offensive alliances with an ambitious and reckless partisanship. The only term to be placed to its advances, Mr. SEWARD pronounces to be the election to the Presidency of a statesman like Mr. LINCOLN, who can command the support of a powerful party in defending the Constitutional landmarks; and while expressing confidence in this event, he scorns the idea that any dangers, disasters, or calamities will [befall?] the Union as consequences of its occurrence.
The treatment of a hacknied topic is novel, effective, and satisfactory. The address is free from several peculiarities of diction and rhetorical infelicities which have been excepted to in some of the Senator’s recent efforts, and will doubtless take rank among the happiest results of his mature culture and statesmanship.