So Long At The Fair is actually more frightening than The Lady Vanishes was. Margaret Lockwood had known her Miss Froy for a day, maybe she HAD hallucinated her...but there is no way that Jean Simmons could hallucinate her own brother, her only relation in the world! Stuck in France, not able to speak much French, and all alone, hers is a desperate search. Though the movie ends too abruptly, overall it was brilliant, and a must-see.
Review of So Long at the Fair
