antico. The quaver motifs in ascending and descending sequences, starting with dactyl figures and becoming increasingly continuous, swirling and scalelike, are a departure from the previous chorale preludes. Among the stile antico features are movement in steps and syncopation. Any tendency for the modal key to become diatonic is counteracted by the chromaticism of the final section where the flowing quavers come to a sudden end. Over the final line of the cantus firmus, the crotchet figures drop successively by semitones with dramatic and unexpected dissonances, recalling a similar but less extended passage at the end of the five-part chorale prelude O lux beata of Matthias Weckmann. As suggests, the twelve descending chromatic steps seem like supplications, repeated cries of eleison—"have mercy". Manualiter settings of Kyrie BWV 672–674 The three manualiter chorale preludes BWV 672–674 are short fugal compositions within the tradition of the chorale fughetta, a form derived from the chorale motet in common use in Central Germany. Johann Christoph Bach, Bach's uncle and organist at Eisenach, produced 44 such fughettas. The brevity of the fughettas is thought to have been dictated by space limitations: they were added to the manuscript at a very late stage in 1739 to fill space between already engraved pedaliter settings. Despite their length and conciseness, the fughettas are all highly unconventional, original and smoothly flowing, sometimes with an other-worldly sweetness. As freely composed chorale preludes, the fugue subjects and motifs are based loosely on the beginning of each line of the cantus firmus, which otherwise does not figure directly. The motifs themselves are developed independently with the subtlety and inventiveness typical of Bach's later contrapuntal writing. has suggested that the set might have been inspired by the cycle of five manualiter settings of "Nun komm, der Heiden Heiland" in Harmonische Seelenlust, published by his contemporary Georg Friedrich Kauffmann in 1733: BWV 673 and 674 employ similar rhythms and motifs to two of Kauffmann's chorale preludes. The Kyries seem to have been conceived as a set, in conformity with the symbolism of the Trinity. This is reflected in the contrasting time signatures of , and . They are also linked harmonically: all start in a major key and move to a minor key before the final cadence; the top part of each fughetta ends on a different note of the E major triad; and there is a matching between closing and beginning notes of