The Sanctus falls naturally into three well-defined parts. The first words, "Sanctus, Dominus Deus Sabaoth!" intended to convey an impression of the most exalted sublimity, are generally treated as a solemn introduction to the more animated and fervent words, "Pleni sunt coli et terra gloria Tua." Agitation rises into joyful emotion in the Osanna, to which the form of a short fugal movement is usually given. The Benedictus,[22] on the other hand, strives to express the secret thanksgiving of the heart at the coming of the Lord. A mild fervour penetrates the simple words, which seem to cast illumining beams on every side. Mozart's artistic originality has so clearly stamped the impress of his genius on the traditional form of the Benedictus that his interpretation of it has become the customary one. It is, as a rule, given {BENEDICTUS.} (251) to solo voices, to which more prominence is given here than elsewhere. Now and then single voices (65,139,194, K.), but more often all the four--now alternately, now in unison--announce the message of consolation; obbligato organ accompaniments serve still further to mark the prominence given to this movement (259 K.). It has a charming effect (258 K.) when the chorus recurring at intervals during the solos enunciates with sustained expression the word "benedictus." The Osanna is usually repeated either entire or abridged from the Sanctus, but it is sometimes interwoven into the Benedictus (139, 262, K.) The last movement falls naturally into two strongly contrasting sections. The first, expressing the sentiments of contrition, of anguished appeal for mercy, was treated with great partiality. The cry, "Agnus Dei, qui tollis peccata mundi," and the prayer, "miserere nobis," furnish a natural grouping not seldom employed for alternations of solo and chorus; the mood expressed is very favourable to musical treatment. The "Dona nobis pacem" is in complete contrast, and in no movement of the mass is the alteration in the spirit of church music more apparent. The peace which is prayed for is vividly represented, and just as vivid is the tone of cheerful confidence with which the prayer is offered. The devout hearer was to be dismissed with a pleasant impression on his mind, and therefore the deep earnestness of this petition for peace was sacrificed in order to produce a feeling of self-satisfied enjoyment. The music of the Dona maintains throughout this cheerful tone, and though Mozart's variety and grace are as marked and effective here as elsewhere, even with him earnestness and depth are rarely to be met with. We may now conclude this general description with a glance in detail on Mozart's masses. We have already spoken of his first attempts. Some unfinished masses, presumably the result of his studies under Padre Martini, exist, bearing date 1771 and 1772. The furthest advanced, in C major (115 K.), breaks off at the ninth bar of the Sanctus. It is accompanied only by a figured organ bass,