Which party was the incumbent from when the cadidates were henry e. barbour (r) 52.1% henry hawson (d) 47.9%?  Answer: Democratic
CREATE TABLE "united_states_house_of_representatives_e" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);
SELECT COUNT("party") FROM "united_states_house_of_representatives_e" WHERE "candidates"='Henry E. Barbour (R) 52.1% Henry Hawson (D) 47.9%';