"Stereotomy"

I was going through some old notes last night, and I found one about "Stereotomy" from 7 March that I'd forgotten about.  Almost all of the "Turn me to stone" lines are sung to a single pitch:  the first two (at ~1:35) are sung to F notes, and the later two (at ~5:10) are sung to A notes.  (The last two [at ~5:37] are both sung to more than one pitch).  This constancy of pitch musically represents the immobility of being a stone.