Career
He was possibly also a composer, but the only two works attributed to him may have been written by Polish composer Moritz Moszkowski. Very little is known about his life. In 1879 he taught at the Institute of Music in Warsaw, where he succeeded Juliusz Janotha.
Ignacy January Paderewski mentions him in his letters, sometimes by disparaging references such as "Mr.
Paul" and "Pablito". Around 1892 he became a professor at the Moscow Conservatory, where his most important pupil was the music historian Leonid Sabaneyev. On 3 February 1894, he performed the Chopin Cello Sonata with the visiting Czechoslovakian cellist Hanuš Wihan, at the Conservatory.
He is unknown as a composer except for two études, Operation 1, for piano. The assertion made in reference materials – that Rachmaninoff used it as his daily warm-up exercise – may also not be entirely accurate (one source refers to this story as a legend).
There are several easily available recordings of the étude, such as by Jorge Bolet and Stephen Hough.
The 1941 recording by Eileen Joyce is considered unsurpassed. The first recording, from 1907, was by the Liszt pupil Vera Timanova. The story goes that they were in fact written by Moszkowski, who lost the manuscript to de Schlözer in a card game, who published them as his own works.
The similarities between de Schlözer"s Étude Number.
2 in A-flat and the 11th of Moszkowski"s 15 Études de Virtuosité, Operation 72, also in A-flat, are striking.
However, it may be that these similarities themselves gave rise to the legend that the de Schlözer pieces were written by Moszkowski.
