CREATE TABLE table_778 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Who was the incumbent when henry e. barbour ran?
SELECT "Candidates" FROM table_778 WHERE "Incumbent" = 'Henry E. Barbour'
SELECT "Candidates" FROM "table_778" WHERE "Incumbent" = 'Henry E. Barbour'