George R. Dennis
George Robertson Dennis , a Democrat, was a United States Senator from Maryland, serving from 18731879. He also served in the Maryland State Senate and the Maryland House of Delegates.
Dennis was born in Whitehaven, Maryland, and graduated from Rensselaer Polytechnic Institute in Troy, New York. He entered the University of Virginia at Charlottesville, and studied medicine at the University of Pennsylvania School of Medicine in Philadelphia. He graduated in 1843 and practiced in Kingston, Maryland for many years, until later devoting himself to agricultural pursuits.
Source: Wikipedia