Ther is no rose of swych vertu

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SA or TB a cappella
This text has been beautifully set by more than one contemporary composer, but we feel the original is still the best.  The homorhythmic style of the burden (refrain) invites filling out with fauxbourdon, a method of harmonizing in parallel 6/3 chords.  Here, as usual, it's the missing middle voice that must be filled in, which has been done here.