There is one novelty which I am responsible for introducing, namely the four-part vocal settings of certain early plain-song melodies. The later plain-song tunes, such as No. 44, are, I suppose[27], as fit for this treatment as any other tunes of the same date; but in the case of the earlier melodies, which were composed before the invention of any complete system of harmony, it is generally agreed that they should be sung in unison, in fact the more elaborate of them cannot be sung otherwise. To give four-part settings of any of these early tunes calls therefore for an explanation, which I will give as briefly as possible. When these tunes are sung, they are usually accompanied, and this implies a harmonic treatment. Now the best harmonic treatment which they can have is the Palestrinal, because that was the earliest complete system, and therefore the nearest to their time, and also because we may rely on the truth of its interpretation of the modes for the reason that Palestrina had never heard any music that was not modal. A modern musician, if he attempts to go back beyond Palestrina, must draw on his imagination, and while his aim must be to produce something artistically and technically less perfect than Palestrina's system, his work, when it is done, will carry neither authority nor conviction. If then we take Palestrina's harmonic interpretation of the modes, it seems to me that there can be no objection to giving vocal parts to the simpler hymns. If it is preferred to sing them in unison, the modal settings will be a guide to the accompanist. But it is my opinion that such settings as I offer will really please, and they may possibly do something to bring these tunes, which have a unique, unmatchable beauty, into favour with choirs that dislike the effort and waste of unison singing. These settings offer no difficulty of execution all; _that is necessary is that the under voices should know the melody_: and though this is not generally thought requisite in a modern hymn, it is asking nothing extra of a choir that would sing the plain-song tunes; for even if they are sung in unison, they must first be known by heart (otherwise their rhythmical freedom, which defies notation, and is indispensable to their beauty, cannot be approached), and when once a choir has got thus far, the under parts, being phrased with the melody, will easily follow it. An explanation of the notation of these settings is given in the note to Hymn 29. Congregational singing of hymns is much to be desired; but, though difficult to obtain, it is not permissible to provoke it by undignified music. Its only sound musical basis is good melody: good melodies should therefore be offered to the people, such as it has been the object of this book to bring together; and they should have as much freedom and variety of rhythm as possible. If some of the good melodies are, owing to their wide compass or other difficulty, unfit for