The 'rests of the first' refers to the tenor rests below the opening upper-voice duet.
Yet that doesn't mean that their duet need be consigned to the ' second-hand bin' of history.
The lack of a decisive cadence at the end of the accompagnato eases the way for the duet to slide back into accompanied recitative.
This, needless to say, is quite unconventional in a big duet at this time.
Above all, however, the duet celebrates the happiness and charm of love.
The duet slithers out of it as well.
The two tonalities are actually interlocked in the duet on a more local level.
There is no lyric expression at the prospect of the union, no duets with her husband-to-be.
