23. “Der erste Satz ist ein Allegro im vierviertel Tact, wo der erste Tact aus C moll anfängt, welcher Gedanke im zweyten aus D moll wiederholt, und im 3ten schon zum Hauptton F dur fortgeschritten wird.” The entire review is given in Suchalla, Briefe und Dokumente, 762–764. Pamela Fox, “Stylistic Anomalies,” 118–119, writes of “expectational defeats” in its first eight measures, and of the “shallow effect” of the opening phrases “which adds to the immediate instability.” Charles Rosen, The Classical Style (New York: W. W. Norton, 1972), 112–114, observes how “the strange C minor opening and the sequence it initiates continue to disturb the tonal stability as far as their echoes in the sixth and seventh measures.”