On August 31, 1830, Chopin wrote:".. I tried the Trio last Sunday and was satisfied with it, perhaps because I had not heard it for a long time. I suppose you will say, "What a happy man!" Something occurred to me on hearing it--namely, that it would be better to employ a viola instead of the violin, for with the violin the E string dominates most, whilst in my Trio it is hardly ever used. The viola would stand in a more proper relation to the violoncello. Then the Trio will be ready for the press."