It gives me pleasure to state that I consider Mr. Boris Sirpo from Finland a conductor of great ability. Moreover Mr. Sirpo has a very rare natural gift for discovering young talented violinists and teaching them in an individual manner. The finnish boy violinist Heimo Haitto is one of the many fine artists that have been instructed by Mr. Sirpo.
Järvenpää, May 17th, 1940
Jean Sibelius