Webster continued to practice law while serving in the House of Representatives, and he argued his first case before the Supreme Court of the United States in early 1814. He had been highly regarded in New Hampshire since his days in Boscawen, and was respected for his service in the House of Representatives, but he came to national prominence as counsel in a number of important Supreme Court cases. Between 1814 and 1852, he argued at least one case in the vast majority of the sessions of the Supreme Court; he served as counsel in a total of 223 cases, and won approximately half of those cases. He also represented numerous clients outside of Supreme Court cases, including prominent individuals such as George Crowninshield, Francis Cabot Lowell, and John Jacob Astor.