Then , at the request of the composer 's mother and sisters , Julian Fontana selected 23 other unpublished piano pieces and grouped them into eight opus numbers ( Op. 66 -- 73 ) .
In 1851 , Tobias Haslinger published it as Op. 4 .
At the request of the composer 's mother and sisters , Julian Fontana selected 23 other unpublished piano pieces and grouped them into eight opus numbers ( Op. 66 -- 73 ) .
In 1851 , Tobias Haslinger published it as Op. 4 .