There's a ritardando beginning around the seventh measure, and I'm not sure of the note value of that last F.
Some of the phrases in this melody (measures one, three, and five) alternate between progressively lower notes and notes of a fixed pitch. I think this is a feature from baroque music, although the only specific piece that I know has this is Bach's Toccata and Fugue in D minor, BWV 565. Here it is (alternating with both descending and ascending notes) in the pedal part:
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