Cyril Scott's composition reflects the harmonic language typical of the British early 20th-century aesthetic. It is distinguished by its unconventional harmonic shifts and a pervasive, lingering mood of introspection.
The primary challenge is balancing the dense, colorful chords without obscuring the inner melodic voices.
Comparable difficulty and character — good candidates for what to learn next.
Autumn Song is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Autumn Song lasts about 4 minutes.
Autumn Song is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Berceuse by Cyril Scott, Autumn Idyll by Cyril Scott, Blackbird's Song by Cyril Scott — see the full similar-pieces list on this page.