* Sydney Box (1907–1986): This person was a British film producer and director. He is known for his work on films such as *The Seventh Veil* (1945), *The Red Shoes* (1948), and *The Tales of Hoffmann* (1951).
* Sydney Box (1932–2015): This person was a British musician and composer. He is known for his work on music for television and film.
It is possible you are thinking of one of these individuals. However, there is no known author named "Sydney Box." Please clarify who you are looking for if possible.