Widor, known primarily for his organ symphonies, also composed charming piano miniatures such as these mélodies. They exhibit a refined Romantic sensibility with clear melodic lines and tasteful harmonies.
Develop a beautiful, singing tone and ensure smooth phrasing to convey the lyrical essence of the melody.
6 Mélodies (Op.37) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
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 6 Mélodies (Op.37) lasts about 3 minutes.
6 Mélodies (Op.37) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.