131. The imitation need only
be relative and continue for three or four notes. It is also well, when a
part uses a striking melodic figure, to have some other part imitate it
immediately after.

[Illustration: Fig. 131.]

SIMPLE COUNTERPOINT IN FOUR PARTS

LESSON XXIII

[Illustration: Fig. 132.]

No new suggestions are needed, except as follows: All covered fifths and
octaves permitted in harmony are allowed here. When the cantus firmus is in
the lowest part and the choice of the last chord but one is V4/3 or vii_6 deg.,
use the latter, as in Fig. 133.

[Illustration: Fig. 133.]

EXERCISES

To canti firmi _a_ and _b_ write the first species in the other parts.
Write each four times, setting the cantus firmus in each part in turn.

CANTI FIRMI

[Illustration: Fig. 134.]

LESSON XXIV

[Illustration: Fig. 135.]

EXERCISES

To cantus firmus _a_ write the first species in all parts, as in the
previous lesson.

To cantus firmus _b_ write the second species in one part. Write four
times, and change with each solution, so that both the cantus firmus and
the second species will appear in each part. [Fig. 135.]

CANTI FIRMI

[Illustration: Fig. 136.]

LESSON XXV

[Illustration: Fig. 137.]

EXERCISES

To cantus firmus _a_ write second species in one part as previously
directed.

To cantus firmus _b_ write the first and second species mixed in the other
three parts. [Fig. 137_a_.]

To cantus firmus _c_ write third species in one part, as directed for the
second species (_b_).

CANTI FIRMI

[Illustration: Fig. 138.]

LESSON XXVI

[Illustration: Fig. 139.]

EXERCISES

To cantus firmus _a_ write the second species in two parts and the first in
the others. Write twice, changing the parts about. [Fig. 139_a_.]

To cantus firmus _b_ write third species in one part as previously
directed.

To cantus firmus _c_ write third species mixed in the other three parts, as
at Fig. 139_b_.

CANTI FIRMI

[Illustration: Fig. 140.]

LESSON XXVII

[Illustration: Fig. 141.]

EXERCISES

To cantus firmus _a_ write the first, second and third species in the other
three parts. Write twice, changing the parts about [Fig. 141_a_.]

To cantus firmus _b_ write fourth species in one part, as directed in
previous lessons. [Fig. 141_b_.]

To cantus firmus _c_ write third species mixed in the other three parts.
[Fig. 139_b_.]

CANTI FIRMI

[I