[62] L. Piquot: Notice sur la vie et les ouvrages de Luigi Boccherini; Paris, 1851.

[63] These are Nos. 1-18, inclusive, in Pohl’s index. The opus numbers by which Haydn’s quartets are usually designated are taken from the thematic index prefixed to the complete Trautwein Edition of 1844. These first quartets are: Opus 1, Nos. 1-6; opus 2, Nos. 1-6; and opus 3, Nos. 1-6.

[64] C. F. Pohl: ‘Joseph Haydn,’ Vol. I, p. 331.

[65] Eugène Sauzay: Étude sur le quatuor. Paris, 1861.

[66] Cf. C. F. Pohl: op. cit., Vol. II, p. 293.

[67] Étude sur le quatuor.

[68] Adagio, allegro, minuetto. The finale rondo was added some years later. Cf. ‘W. A. Mozart,’ by de Wyzewa and de Saint-Foix: Paris, 1912.

[69] Cf. Wyzewa and Saint-Foix: op cit. Gassmann was born in Bohemia in 1723 and died in Vienna in 1774. A great many of his works in manuscript are in the libraries at Milan. He had been appointed to a place in Vienna in 1762, and was hardly likely, therefore, to be in Milan when Mozart was; but he had lived at one time in Milan and came back there occasionally from Vienna to superintend performances of his operas.