Theodore Vail, the presiding genius of the greatest telephone system in the world, is Irish, and so is Carty, its chief engineer. Morse, the inventor of the telegraph, was the grandson of an Irishman; Henry O'Reilly built the first telegraph line in the United States; and John W. Mackey was the president of the Commercial Cable Company. John P. Holland, the inventor of the submarine torpedo boat, was a native of Co. Clare; and McCormick, the inventor of the reaping and mowing machine, was an Irishman's grandson. Sons of Irishmen have stood in the front rank of American statesmen and diplomats who represented their country abroad. To mention but a few: Richard O'Brien, appointed by Jefferson American representative at Algiers; James Kavanagh, Minister to Portugal; and Louis McLane, Minister to England in 1829 and afterwards Secretary of State in 1832. In recent years, an O'Brien has represented American interests in Italy and Japan; a Kerens in Austria; an Egan in Chili and another of the same name in Denmark; an O'Shaughnessy in Mexico; a Sullivan in Santo Domingo; and an O'Rear in Bolivia. Among historians were John Gilmary Shea, author of numerous historical works; Dr. Robert Walsh, a learned historian and journalist of the last century, whose literary labors were extensive; McMahon and McSherry, historians of Maryland; Burk, of Virginia; O'Callaghan, Hastings, and Murphy of New York; Ramsay of South Carolina; and Williamson of North Carolina, all native Irishmen or sons of Irish immigrants.