Mr. Levischesky, a Polander, formerly in the suit of Koskiusko, was a very great Horn player and had the astonishing facility of producing two tones at once, by singing a subject and at the same time blowing and accompanyment on the Horn. He also excelled on the Spanish Guitar and sung Italian airs with superior taste and expression. About this time, another very fine Horn player appeared, a Monsieur Rossier. Neither of these gentlemen remained long in America. 

[Euterpeiad, vol. III, no. 3 ( 27 April 1822), p. 18]