The Young Person’s Guide to the Orchestra originated as music for an educational film, Instruments of the Orchestra (1946), before being transformed by the composer into a piece for the concert hall. No earlier sketches are known to survive, and it seems that Britten composed the piece directly into this draft score. The manuscript reveals the astonishing fluency with which Britten was able to construct a large-scale work. Almost every aspect of the piece is already worked out in detail in this draft, which was completely unknown until 2011. It was acquired by the British Library in 2012.