Name the vacator for resigned february 26, 1836 because of ill health
CREATE TABLE "table1_225200_4" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);
SELECT "vacator" FROM "table1_225200_4" WHERE "reason_for_change"='Resigned February 26, 1836 because of ill health';