1. Consecutive fifths (and a fortiori consecutive octaves) are forbidden between any two parts if no other notes intervene, no matter what the value of the note.Pretty obvious. Here's the second:
2. Consecutives on successive semibreve beats are broken by the intervention of a minim if it is a harmony note, but not if it is a passing discord. Consecutives on successive minim beats are similarly broken by the intervention of a crotchet if it is a harmony note; not otherwise. (This is the doctrine of Morley, and it is in every way substantiated by sixteenth-century practice.)Morris throws students a lifeline by letting them finesse parallels via consonant escape tones. (I don't have a problem with this, but I'm pretty sure I have at least one other textbook that does.) But then we get to his third rule:
3. A suspension may be said to temper the wind to the shorn consecutive.The what to the what now? What he's getting at is that it's OK to use a suspension to avoid parallel fifths even though they're technically "still there" (i.e., they show up if you move the suspended note onto the beat). But that's pretty Modernist-enigmatic for a counterpoint rule. It's practically a haiku.
The note, suspended,Ezra Pound would have slapped an ideogram on that and sent it to Harriet Monroe. I need to hunt down Morris's book on keyboard harmony; I'm hoping for an Imagist evocation of the various semitonal alterations available on the subdominant.
Will temper the wind to the
Update (4/26): Joshua Kosman reads more than I do (see comments).