He is descended, on the paternal side, from a Scottish gentleman named John Blackwood, who went over from his native country to Ireland, and settled in the county Down, towards the close of the sixteenth century. The family has ever since resided in that county, and has played a not unimportant part in the political history of Ireland. In 1763 a baronetcy was conferred upon the then chief representative of the family, who was conspicuous in his day and generation as a vehement supporter of the Whig side in politics. In 1800 the head of the family was created an Irish peer, with the title of Baron Dufferin and Clandeboye. The father of the present representative was Price, fourth Baron, who succeeded to the title in 1839. Fourteen years prior to his accession to the title--that is to say, in the year 1825--this gentleman married Miss Helen Selina Sheridan, a granddaughter of the Right Hon. Richard Brinsley Sheridan. The distinguished orator and dramatist, as all the world knows, had a son named Thomas Sheridan, who inherited no inconsiderable share of his father's wit and genius. Thomas--better known as Tom--Sheridan, had three daughters, all of whom were prominent members of English society, and were conspicuous alike for personal beauty and the brilliancy of their intellectual accomplishments. One of them was the beautiful Lady Seymour, afterwards Duchess of Somerset, who presided as Queen of Beauty at the famous tournament held at the Earl of Eglinton's seat in Scotland, in the month of August, 1839. Another daughter, the Hon. Mrs. Caroline Norton, won distinction by her poetical effusions, and by several novels, one of which, "Stuart of Dunleath," is a work exhibiting a high degree of mental power. This lady, whose domestic misfortunes formed at one time an absorbing topic of discussion in England, survived until 1877, having some months before her death been married to the late Sir W. Stirling Maxwell. The remaining daughter, Harriet Selina, was the eldest of the three. She, as we have seen, married Captain Price Blackwood, and subsequently became Lady Dufferin upon her husband's accession to the title in 1839. She also won a name in literature by numerous popular songs and ballads, the best known of which is "The Irish Emigrant's Lament." She was left a widow in 1841, and twenty-one years later, by a second marriage, became Countess of Gifford. She died in 1867. Her only son, Frederick Temple, the subject of this sketch, was born at Florence, in Italy, on the 21st of June, 1826.