Brackenridge. I. Hugh Henry, an American judge and author, born near Campbelton, Scotland, in 1748, died at Carlisle, Penn., in 1816. In 1771 he graduated at Princeton college, where he subsequently acted as tutor. Having studied divinity, he became a chaplain in the continental army; but he soon relinquished the pulpit for the bar, and edited for a time the "United States Magazine" at Philadelphia. In 1781 he established himself at Pittsburgh, and in 1799 was appointed a judge of the supreme court of the state, which office he held till his death. He participated with Gallatin in the whiskey insurrection, and vindicated his course in the " Incidents of the Insurrection in Western Pennsylvania, in 1794," published in 1795. His " Modern Chivalry, or the Adventures of Captain Farrago," a humorous and political satire, has been especially popular throughout the West. The first portion was published at Pittsburgh in 1796, and was republished in Philadelphia in 1846, with illustrations by Darley. The second portion was published 10 years after the first, and both were issued together in 1819. He also wrote many miscellaneous essays and fugitive verses.

II. Henry M., an American lawyer, diplomatist, and author, son of the preceding, born in Pittsburgh, Penn., May 11,1786, died there, Jan. 18, 1871. At 20 yeans of age, having been admitted to the bar, he commenced practice in Somerset, Maryland. In 1811 he was appointed deputy attorney general for the territory of Orleans, afterward the state of Louisiana, and the next year was made district judge. During the war of 1812 he gave the government valuable information, and afterward wrote a history of the war, which was translated into French and Italian. He joined with Mr. Clay in advocating the acknowledgment of the independence of the South American republics. His pamphlet under the name of " An American," addressed to President Monroe, was republished in England and France, and, being supposed to express the views of the American government, was replied to by the duke of San Carlos, the Spanish minister. He was appointed one of the commissioners to the South American republics in 1817, and on his return published his "Voyage to South America," which was said by Humboldt to contain an " extraordinary mass of information." He accompanied Gen. Jackson to Florida in 1821, and in May was appointed judge of the western district, in which office he remained for 10 years.

He removed to Pittsburgh in 1832, was elected to congress in 1840, and the year after was named a commissioner under the treaty with Mexico. His political writings are numerous. In 1859 he published a " History of the Western Insurrection,'1 in vindication of his father.