But our patrician Charles, the king of the Franks, disturbed when at Rome by the discrepancy between the Roman and the Gallican chant, is said to have asked – when the impudence of the Gauls argued that the chant was corrupted by certain tunes of ours, while on the contrary our melodies demonstrably represented the authentic antiphoner – whether the stream or the fountain is liable to preserve the clearer water. When they replied that it was the fountain, he wisely added: "Therefore it is necessary that we, who have up to now drunk the tainted water of the stream, return to the flowing source of the perennial fountain." Shortly afterward, then, he left two of his diligent clergymen with Hadrian, a bishop at the time, and, after they had been schooled with the necessary refinement, he employed them to recall the province of Metz to the sweetness of the original chant, and through her, to correct his entire region of Gaul.