THE LETTERS OF WOLFGANG AMADEUS MOZART. (1769-1791… WebSECOND PART.—MUNICH, AUGSBURG, MANNHEIM.—SEPTEMBER 1771 TO MARCH 1778. On the 22d of December, 1777, Mozart's father wrote as follows to Padre Martini in Bologna:—"My son has been now five years in the service of our Prince, at a mere nominal salary, hoping that by degrees his earnest endeavors and any talents he may possess, …