DENNIS, George R., senator, born in White Hayen, Somerset County, Maryland, 8 April 1822. He was graduated at the Polytechnic institute of Troy, New York, and entered the University of Virginia. He studied medicine at the University of Pennsylvania, was graduated there in 1842, and, after practicing for several years, he retired and has since devoted his attention to agriculture. He was a delegate to the National convention that nominated Fillmore in 1856, and to the Democratic national convention in 1868, serving as one of the vice presidents. He was elected to the Maryland state senate in 1854, to the House of Delegates in 1867, and to the senate again in 1871. While filling this office he was elected U. S. senator from Maryland as a Democrat, serving until 1873.