The Duke of Newcastle on our Diffculties.
--The following extract from a letter, dated February 8, 1861, and written by the Duke of Newcastle, the Secretary of State for the Colonies, to a gentleman of New York, we may quote (says the Boston Courier,) as a candid and voluntary expression of English opinion, and one entitled to more than usual importance, considering the eminent source from which it emanates:‘ "Let me assure you, and those with whom you are associated, how anxiously we all desire, in this country, to see a happy termination to the troubles which are now afflicting the United States. The accounts from thence are watched with an intensity of interest scarcely less than that which, three years ago, attached to every mail from India."
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