Guillanme Henri Dufour, a Swiss general, born in Constance, Sept. 15, 1787. He was educated in Geneva and Paris, entered the French army, obtained a commission in 1809, served in the last campaigns of Napoleon, and distinguished himself during the hundred days. When Geneva was restored to Switzerland, he became a citizen of the republic, and in 1831 was made chief of the staff of a corps destined to defend its neutrality. He was intrusted with the management of the military school at Thun, and with the survey of Switzerland. When the organization of the Sonderbund, and the apprehended intervention of foreign powers, seemed to threaten the existence of the confederation in 1847, he was chosen commander-in-chief of the federal forces, and rapidly suppressed the civil war. In 1864 he was president of an international council in regard to the treatment of the wounded, which resulted in the convention of Aug. 22 between 12 European states. He is the author of De la fortification permanente (1824), Geometric perspective, etc. (1827), Memoires sur l'artillerie des anciens et sur celle du moyen age (1840), and Manuel de tactique (1842).