 In 1908, with Jozef Jaroszyński (a patron of Kochanski's), they made a triumphant tour of European capitals, including Berlin, Paris, London and Karlsbad, and in 1908–9 Kochanski and Rubinstein performed the Franck Violin Sonata in A, the "Kreutzer" again, and a Brahms trio (with Eli Kochański, a cellist and Paul's gifted brother) for the Warsaw Philharmonic.From 1909 to 1911 Kochanski taught at the Warsaw Conservatory as professor of violin.In 1909 he and Rubinstein gave the first performance of Karol Szymanowski's Violin Sonata in D minor.