After the death of her husband in 1483, Elizabeth remained politically influential even after her son, briefly proclaimed King Edward V of England, was deposed by her brother-in-law, Richard III. Edward and his younger brother Richard both disappeared soon afterward, and are presumed to have been murdered. Elizabeth subsequently played an important role in securing the accession of Henry VII in 1485. Henry married her daughter Elizabeth of York, ended the Wars of the Roses, and established the Tudor dynasty. Through her daughter, Elizabeth was a grandmother of the future Henry VIII. Elizabeth was forced to yield pre-eminence to Henry VII's mother, Lady Margaret Beaufort; her influence on events in these years, and her eventual departure from court into retirement, remain obscure.