BADEAU, Adam, author, born in New York City, 29 December 1831. His education was received through private instruction and at a boarding-school in Tarrytown, New York He volunteered in the military service of the United States in 1862, and was appointed aide on the staff of Brig-General Thomas W. Sherman. In that capacity he served in Louisiana until 27 May 1863, when he was severely wounded, almost at the same time with his commanding officer, in leading an assault on the confederate works at Port Hudson. In March 1864, he was appointed military secretary to General Grant, with the rank, first of Lieutenant-Colonel and afterward of colonel. On this duty he accompanied the general in the Wilderness and Appomattox campaigns, and remained on his staff until March 1869, when he was retired from the army with the full rank of captain and the brevet rank of Brigadier-General, United States. He also received a similar brevet in the volunteer service. From May to December 1869, he was secretary of legation at London. During 1870 he was sent to Madrid as a bearer of government dispatches, and in May returned to London as consul-general, retaining that office until September 1881. In 1877 and 1878 he was given leave of absence by the state department to accompany General Grant on his tour round the world. He was consul-general at Havana from May 1882, until April. 1884, and then resigned because he was not permitted by the state department to substantiate charges of corruption of which he accused its administration. He had been appointed United States minister to Brussels in 1875, and to Copenhagen in 1881, but declined both appointments. He has published "The Vagabond," a collection of essays (New York, 1859): "Military History of Ulysses S. Grant" (3 vols.. 1867-'81) ;" Conspiracy : a Cuban Romance "(1885) ; "Aristocracy in England" (1886); and "Grant in Peace" (1886).