Table schema:
CREATE TABLE table_name_15 (second_member VARCHAR, first_member VARCHAR, first_party VARCHAR, year VARCHAR)

Question: Who is the second member ewarlier than 1804 when Tory Henry Isherwood is the first member?
SQL: SELECT second_member FROM table_name_15 WHERE first_party = "tory" AND year < 1804 AND first_member = "henry isherwood"