Lawyer, Congressman, Delegate and Horticulturist. William was the third son of Sarah Rion and Robert Lucas. He was born on November 30th at "Cold Spring" a Stone house on the original Lucas grant, located near Duffields in Jefferson County, WV. He studied law under Judge Henry St. George Tucker in Winchester, Virginia and practiced law in Charles Town and Shepherdstown. He served two terms in the U.S. Congress, from 1839 to1841 and 1843 to1845, and was a delegate to the Virginia constitutional convention in 1850 and 1851. His avocation was horticulture. He developed small farms into a large estate called "Rion Hall", before 1861. He chose this name from family linage, the Rions and the Halls, early owners of much of the land from which the estate was created. He ordered trees and shrubs from William Robert Prince of Long Island. Price whom was the fourth generation proprietor of a nursery in Flushing, which originally was established by his great grandfather Robert Price in 1730. Mr. Lucas ordered many varieties of fruit trees, grapes, raspberries, gooseberries etc, also ornamental trees and shrubs to decorate his estate. He married Virginia Ann Bedinger in 1830, the daughter of Sarah Rutherford and Daniel Bedinger of Shepherdstown. This union gave them 3 children. She died in 1840, and William never remarried. He out lived all his children except his son Judge Daniel Lucas who inherited "Rion Hall".