When Mozart visited the Sixtine chapel at Rome to steal a copy of the celebrated Miserere, performed in the passion-week, and which was presented to the emperor's chapel at Vienna, it entirely failed. I was present at the Ancient Concert when this piece was introduced, and, as at Vienna, it had no more effect than the dullest and most common chant. There is a precision and dexterity in a band of this kind, that can scarcely be explained by written characters. In accelerating or retarding the time, in swelling or diminishing, according to the sentiment of the pass age, a result is produced which can only be attained by great talent, exquisite taste, and long practice.