Thanks! I knew parallel fifths were to be avoided as a rule, but nobody ever warned me against parallel octaves. Most of my knowledge of harmony and counterpoint, aside from what I've picked up from reading and singing music (plus studying music as one of the seven liberal arts at Thomas Aquinas College many years ago), is derived from Sixteenth-Century Polyphony by Arthur Tillman Merritt. Can you recommend any other helpful books? . . . As for the hidden parallel fifth, I see it now that you mention it, but it seems pretty brief and non-obvious, and I probably won't change it because our choir has already sung it a couple of times. :o) I'll post some more compositions (probably only a couple more before bedtime tonight), and they'll be more "changeable" because the choir hasn't sung them.