Kelly’s Allegretto displays a melodic sensibility deeply rooted in the late Romantic tradition with a British lyrical sensibility. Its distinctiveness lies in its rich, nostalgic harmonic language.
The player must navigate wide-span chords and delicate voicing to maintain the melodic contour.
Comparable difficulty and character — good candidates for what to learn next.
Allegretto in A major is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Allegretto in A major lasts about 3 minutes.
Allegretto in A major 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 Bisham Waltzes by Frederick Septimus Kelly, Ave Maria in A (1860) by Camille Saint-Saëns, Au soir by Joachim Raff — see the full similar-pieces list on this page.