freely on any but the first quarter, but must be consonant with the other
part. [Fig. 57.]

[Illustration: Fig. 57.]

The first and third species may be mixed, as in Fig. 58.

[Illustration: Fig. 58.]

The second species may be used in one part and the third in the other, also
six notes in one part and two in the other, and six in one and three in the
other. All tones appearing simultaneously, must comply with the suggestions
for tones appearing on the weak beat given in previous lessons, where both
parts have other than the first species. [Fig. 59.]

[Illustration: Fig. 59.]

The cadences in Fig. 60 are good, and will suggest others.

[Illustration: Fig. 60.]


EXERCISES

To cantus firmus _a_ write one counterpoint above and one below, in the
third species.

To cantus firmus _b_ write counterpoints in six notes, one above and one
below. [Fig. 52.]