Yet he left behind him some other writings which show well that the hand which penned the ``Two Years’’ never lost its cunning. He made an interesting visit to Europe, and, later in life, in 1859-60, made a journey round the world. The record which he kept on these journeys has been drawn upon largely in the biography[2] prepared by Charles Francis Adams, who was in his early days a student in Dana’s office, and there one finds page after page of delightfully animated description and narrative. He wrote for his own pleasure and for that of his family, and his writing was like brilliant talk, the outflow of a generous mind not easily saved for more common use. He published notes to Wheaton’s ``International Law,’’ several of which are quoted in all new works on the subject to this day.
The journey which he took round the world was for the purpose of restoring his health, which had been greatly impaired. He came back in improved condition, and entered upon the excited period of the war, when he held the office of United States District Attorney. During this time he argued the famous prize causes before the United States Supreme Court, and his argument was the one that turned the Court, which was democratic in its politics, to take the unanimous view that the United States Government had a right to establish blockade and take prizes of foreign vessels that were breaking this blockade. Had it not been for this decision, so largely influenced, as the Court itself generously states, by Mr. Dana’s argument, the Civil War would have been greatly prolonged, with possibly another, or at least a doubtful issue. He afterward served in the Massachusetts legislature, and there made several noted speeches, among others his argument on the repeal of the usury laws, a bill for which was unexpectedly carried in that body as the result of this speech which has been reprinted for use before legislatures of other states.