Robson ran away from home to marry her first husband, 18 year-old Charles Leveson Gore, in London. They were married on 1 November 1875 at the parish church in Camden Town, London. The couple traveled on the steamer SS "Vaderland" and arrived in New York on 17 May 1877. The Gores purchased 380 acres of land in Fort Worth, Texas where they built a house and established a cattle ranch. According to Jan Jones, "the Gores survived two years in their prairie manor house before homesickness, rural isolation, and repeated bouts of fever convinced them to sell and try their fortunes in the more settled east." They moved to New York City with little money and Robson says that shortly after, Gore died.