The mystics leaned to rigid unity, and in the sixth century Saint Gregory published his 'Antifonario,' a collection of all liturgic melodies, purifying them according to his ideas.

They were a mixture of two elements: the Greek, rather oriental and florid, very much like the present debased style; and the grave and rough Roman.

The notes were expressed by letters, the Phrygian and Lydian styles followed, and so the intricacies of Greek music continued though much altered, with fioriture, rests, and breathing pauses.

The collection became lost, and many who think a return to the old style would be best, much regret it.

To judge by the fragments that remain, if such music was now executed it would have very little that was religious about it, as we understand religion in art to-day; it would more resemble the songs of the Moors, or the Chinese, or those of some schismatic Greeks who still use the ancient liturgies.