Raoul Koczalski
…never studied at a conservatory but had further private lesson on the piano and in composition with Ludwig Marek (1891–1892), Karol Mikuli (1821–1897) (Chopin's favorite Polish student and composer) and instrumentation with Henryk Jarecki (1893–1894). At the age of 7 he gave concerts, and at 9 he was playing…