When Helen Keller first arrived at Cedar Beach on Long Island’s East End, she told her neighbor that she could sense everything around her. “How beautiful the water and trees are,” she said.

Keller’s 1919 film was not her only film appearance. In 1954, Keller appeared in the film documentary “Helen Keller: In Her Story.” In 2023, the film was among 25 selected by the Library of ...