This piece by Michał Zawadzki is a quintessential Romantic character piece reflecting the Polish salon tradition. Its distinction lies in the expressive, folk-inflected melodic line common to 19th-century Polish composers.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: a true singing tone, with the melody floating above the accompaniment; rubato that must breathe naturally without losing the pulse; and chord voicing — bringing out one note inside a handful of others.
Beyond that, expect careful pedaling — clarity depends on the foot as much as the fingers.
The primary challenge is balancing the singing melody against the delicate, introspective accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Coś mnię tęskno (Op.48) 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 Coś mnię tęskno (Op.48) lasts about 4 minutes.
Coś mnię tęskno (Op.48) 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 Nocturne in C-sharp minor by Frédéric Chopin, Albumblad by Edvard Grieg, Coloured Leaves by William Baines — see the full similar-pieces list on this page.