CREATE TABLE table_203_778 (id DECIMAL, "representative" TEXT, "title" TEXT, "presentation\ of credentials" TEXT, "termination\ of mission" TEXT, "appointed by" TEXT)

which date is below april 17 , 1854
SELECT "termination\nof mission" FROM table_203_778 WHERE id = (SELECT id FROM table_203_778 WHERE "termination\nof mission" = 'april 17, 1854') + 1
SELECT "termination\nof mission" FROM "table_203_778" WHERE "id" = (SELECT "id" FROM "table_203_778" WHERE "termination\nof mission" = 'april 17, 1854') + 1