Horsey was born October 18, 1924, at Beebe Hospital in
Lewes, Delaware, to Harold Wolfe Horsey and Philippa Elizabeth Ridgely Horsey. He grew up in
Dover, Delaware, and spent his summers swimming in the ocean and sailing at
Rehoboth Beach. Horsey graduated from
Loomis Chaffee School, a high school in Connecticut. He was drafted at age 18 and served in the
United States Army from 1943 to 1946 as an
infantry and
combat engineer before entering the
European Theater and being discharged as a sergeant. Horsey attended
Harvard College and
Harvard Law School and graduated in 1952. He was admitted to the Delaware Bar in 1953 and practiced law in
Wilmington, Delaware at Potter, Anderson & Corroon from 1935 to 1965. He also worked for Wilmington Trust Company as a trust officer and assistant vice president. After the death of his grandmother, Horsey moved to Dover in 1965 and continued to practice law as a deputy attorney general of the state of Delaware. He also operated his own law practice until 1969 before practicing at Morris, James, Hitchens & Williams.
Advocacy Horsey became active in city politics to support environmental protection. In 1989, Horsey established the first protective sand dunes in Rehoboth Beach, after receiving pushback from city officials. The dunes continue to protect the beach communities and homes along the shore today. ==Delaware Supreme Court==