It is very unlikely that this work is public domain in the EU, or in any country where the copyright term is life-plus-70 years. However, it is in the public domain in Canada (where IMSLP is hosted) and other countries where the term is life-plus-50 years (such as China, Japan, Korea and many others worldwide). As this work was first published before 1924 or failed to meet notice or renewal requirements to secure statutory copyright with no "restoration" under the GATT amendments, it is very likely to be public domain in the USA as well.
|Composition Year||1917 (April)|
|Genre Categories||;; ; ;|
|Work Title||Cello Sonata|
|Opus/Catalogue NumberOp./Cat. No.||Op.66|
|I-Catalogue NumberI-Cat. No.||ICK 4|
|Year/Date of CompositionY/D of Comp.||1917 (April)|
|First Performance.||1924-03-06 by M. L. Laggé, Marius-François Gaillard (piano), Concert SMI, Salle des Agriculteurs|
|First Publication.||1923 (Senart)|
|Dedication||à Charles Van Isterdaël (1873-1962)|
|Average DurationAvg. Duration||10-15 minutes|
|Composer Time PeriodComp. Period||Early 20th century|
|Piece Style||Early 20th century|
|External Links||Wikipedia (French)|
Mostly unmetered, though the opening of the first movement sticks to 6/4 (or proportional) for awhile and merely lacks a time signature.