CREATE TABLE table_24399 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

When james brooks (d) is the vacator what is the date the successor was seated?
SELECT "Date successor seated" FROM table_24399 WHERE "Vacator" = 'James Brooks (D)'
SELECT "Date successor seated" FROM "table_24399" WHERE "Vacator" = 'James Brooks (D)'