Tchaikovsky Piano Sonata in C sharp minor

[swpianist]

Greetings,

I am researching Tchaikovsky's Piano Sonata in C sharp minor, Op. Posth. 80, composed in 1865. The score, although used as recently for performance and publication as 1901, is now, unfortunately, lost. I am hoping to track down the details of this score's history, it's last known location. This work is little known, and might be completely unknown if it weren't for two fascinating recordings of it made by pianists Samuil Feinberg and Emil Gilels. The Scherzo of this rarely heard Sonata is the same Scherzo as Tchaikovsky's First Symphony, Op. 13.

If anyone has any clue about this work, comments, or knowledge of it, please contact me.

Also, if anyone has any idea about how to locate the score (or at least its last known whereabouts) I am greatly interested. It's sort of a musical archeology project.

The first publisher, in 1900, was Peter Jurgenson, Moscow.

Thanks!

[Carolus]

It was given the opus number of 80 at the time of its publication. The IMSLP page is here: http://imslp.org/wiki/Piano_Sonata%2C_O ... _Ilyich%29