We have written of Mr. Mitchel only in reference to his political career; but we can, without trenching in any degree on the domain of private life, supply some additional and authentic details which will be of interest to Irish readers. The distinguished subject of our memoir was born at Camnish, near Dungiven, in the county of Derry, on the 3rd of November, 1815. His father was the Rev. John Mitchel, at that time Presbyterian Minister of Dungiven, and a good patriot, too, having been--as we learn from a statement casually made by Mr. Mitchel in Conciliation Hall--one of the United Irishmen of 1798. The maiden name of his mother, who also came of a Presbyterian and county Derry family, was Mary Haslitt. At Newry, whither the Rev. Mr. Mitchel removed in the year 1823, and where he continued to reside till his death in 1843, young John Mitchel was sent to the school of Dr. David Henderson, from which he entered Trinity College, Dublin, about the year 1830 or 1831. He did not reside within the college, but kept his terms by coming up from the country to attend the quarterly examinations. Though he did not distinguish himself in his college course, and had paid no more attention to the books prescribed for his studies than seemed necessary for passing his examinations respectably, John Mitchel was known to his intimate friends to be a fine scholar and possessed of rare ability. While still a college student, he was bound apprentice to a solicitor in Newry. Before the completion of his apprenticeship, in the year 1835, he married Jane Verner, a young lady of remarkable beauty, and only sixteen years of age at the time, a daughter of Captain James Verner. Not long after his marriage he entered into partnership in his profession, and in conformity with the arrangements agreed upon, went to reside at Banbridge, a town ten miles north of Newry, where he continued to practice as a solicitor until the death of Thomas Davis in 1845. He had been an occasional contributor to the _Nation_ almost from the date of its foundation; its editors recognised at once his splendid literary powers, and when the "Library of Ireland" was projected, pressed him to write one of the volumes, suggesting as his subject the Life of Hugh O'Neill. How ably he fulfilled the task is known to his countrymen, who rightly regard the volume as one of the most valuable of the whole series. When death removed the amiable and gifted Thomas Davis from the scene of his labours, Mr. Duffy invited John Mitchel, as the man most worthy of all in Ireland, to take his place. Mr. Mitchel regarded the invitation as the call of his country. He gave up his professional business in Banbridge, removed with his wife and family to Dublin, and there throwing himself heart and soul into the cause, fought it out boldly and impetuously until the day when, bound in British chains, "the enemy" bore him off from Ireland. * * * * * JOHN MARTIN.