A Heart to Let (Agatha's Aunt) (1921)

Agatha Kent inherits a southern mansion from her maiden aunt, Agatha. When she advertises for boarders, Burton Forbes, who is blind and alone in the world, recalls his visits to Aunt Agatha as a boy and rents a room. Assuming the roles of her aunt and an Irish maid, young Agatha looks after her guest, who is distressed over a broken engagement. His gratitude for her kindness ripens into love, which she reciprocates, unaware that his sight has returned. A lucky turn on the stock market results in the restoration of Burton's fortune, and when his former fiancée asks to resume their engagement, he rejects her for Agatha.