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 1927 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.
|Genre Categories||; ;; ; ;|
|Work Title||Piano Trio No.1|
|Opus/Catalogue NumberOp./Cat. No.||Op.20|
|I-Catalogue NumberI-Cat. No.||IWF 2|
|First Performance.||1917 March 1?|
|Dedication||To my mother.|
|Composer Time PeriodComp. Period||Early 20th century|
|Piece Style||Early 20th century|
|Instrumentation||piano, violin, cello|
Definitely harmonically "Early 20th century" more than "Romantic" (not to say such music wasn't composed in the late 19th century, which had its outliers.)
Musical Times of April 1 1917 notes that at an "All British" concert at the Steinway Hall, London, on March 1, a trio of William Fenney was given for the first time.