Share to Google Classroom A Fourth of July picnic celebration at Frogmore, photographed in color in 1939 by Marion Post for the Farm Security Administration. Courtesy of the Library of Congress. Grades: 3 4 5 6 7 8 9 10 11 12 Subjects: Social StudiesS.C. HistorySouth Carolina CultureFood Traditions Collection: Explore South CarolinaAgriculturePlaces to Visit in S.C.Towns & CitiesSouth Carolina CountiesBeaufort Series: History of SC Slide CollectionG. South Carolina Towns & Cities | History of SC Slide CollectionFrogmore