Maurice Besly's 'An Epitaph' is a reflective, elegiac work that uses a somber harmonic language. It evokes a quiet, mournful atmosphere consistent with its title.
Sustaining a long, mournful melodic line through careful phrase-shaping is the primary task.
Comparable difficulty and character — good candidates for what to learn next.
An Epitaph 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 An Epitaph lasts about 3 minutes.
An Epitaph 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 Autumn Shadows by Marius Blanc, Beautiful Thoughts by Joseph Kaspar Raff, Ballade No. 1 by Henning Mankell — see the full similar-pieces list on this page.