The Psalms and Canticles are generally sung to a chant. These are of two kinds--_Gregorian_ and _Anglican_. Gregorian chants are very ancient; a collection of them was compiled by Gregory, Bishop of Rome, about A.D. 600. They are sung in unison. Anglican chants, which are of much more recent invention, are sung in harmony. Nearly all our Church music is based on the Gregorian chant. A _single_ chant is an air consisting of two phrases, corresponding to the two parts into which every verse of the Psalms and Canticles is divided in our Prayer Book by a colon. A double chant consists of four parts. Sometimes the Canticles are sung to what is called a _Service_, which is a musical arrangement similar to the Anthem. _Hymn_, a metrical song of praise. Hymns are nowhere formally authorised in our Church, with one exception, viz., the _Veni Creator_ in the Ordination Service. Still, metrical hymns have been sung in the Church from Apostolic times, the words of some of which are extant. The "hymn" sung by our Lord and his disciples at the Last Supper was probably the "Hallel," Psalms cvii.--cxviii. _Anthem_, as the term is usually understood in England, consists of passages from Holy Scripture set to music; such also are _Introits_. Anthems are almost peculiar to our Church, but have been in constant use in it since the Reformation. Other parts of the Service, such as the Prayers, the Versicles, the Litany, are frequently read either on one note (_monotoned_), or on one note occasionally varied at the end by a cadence (_intoned_). This is objected to by some as being unnatural; but it is not so. A child naturally _intones_ or _monotones_ if set to read or recite. And where a congregation have to repeat the same words together, it is absolutely necessary that they should do it on some given note, or the result would be Babel. Children in school, of their own accord, say their lessons together in a monotone. The practice of doing so in the Church dates from the very earliest times.