Bob, if I take your meaning from the example, what you are calling an inverted iamb is just an iamb with the vocal stress in the usual place but the metrical stress promoted onto a normally unstressed syllable, and not a trochee at all. I can go along with that.
And yes, that is a good example of a final trochee in iambic lines working, and of course I wouldn't change it, but is there really much difference in function between the caesura that sets the trochee up and a syllable like "and" inserted there? The full stop obviates the need for an extra syllable before the accented syllable and makes the "y" of the trochee function rather like a hypersyllable.
Carol
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