 (Robbins Landon, 1967) Whether Mozart knew Haydn's later C major symphony has not been proven conclusively by historical means, but Alfred Einstein ranks among the convinced, because of comparisons of the music.As in the first movement, in the last movement the two horns again begin in G and switch to in C for the recapitulation.According to Leopold Mozart, Michael Haydn considered continuo to be essential even for his most fully instrumented works.