HENNINGSEN, Charles Frederick, soldier, born in England in 1815; died in Washington, D. C., 14 June, 1877. His parents were Swedes. He joined the Carlist army in Spain in 1834, and rose to the rank of lieutenant-colonel. After the peace convention he returned to England, but on the renewal of the war resumed his post, and after the battle of Vielas de los Navarros was promoted colonel and given the command of the cavalry. He was afterward taken prisoner and released on parole. After serving in the Russian army in Cir-cassia, he joined Kossuth in the Hungarian revolution, becoming military and civil commander of the fortress of Comorn. Afterward he came to the United States as a representative of Hungarian interests, and in October, 1856, joined William Walker in Nicaragua. He was immediately made a brigadier-general, given command of the artillery, and rendered efficient service, distinguishing himself by his defence of Granada, and in the victory at Queresma. He took part in Walker's negotiations with Commander Davis in 1857, and after the surrender to that officer returned to the United States. At the beginning of the civil war he entered the Confederate army as colonel of the 3d regiment of Wise's brigade, and was afterward made brigadier-general, and served in Virginia. General Henningsen was an able artillerist, and also gave much attention to improvements in small arms, superintending the construction of the first Minie rifles ever made in the United States. He published "Revelations of Russia" (Paris, 1845); "Twelve Months' Campaign with Zumalacarregui"; "The White Slave," a novel; "Eastern Europe "; "Sixty Years Hence," a novel of Russian life; "Past and Future of Hungary "; "Analogies and Contrasts "; "Personal Recollections of Nicaragua"; and various other works, most of which were published in London.