In 1737, he wrote "La Clemenza di Tito", on a libretto by Angelo Maria Cori based on Metastasio. In 1738 Veracini wrote his third opera, "Partenio", and returned to Florence where he stayed till 1741. Back in London he composed his last opera, "Roselinda", based on Shakespeare's play "As You Like It", a most unusual choice of material at that time. In that opera Veracini included the well-known Scots ballad tune "The Lass of Paties Mill". It was staged in London in 1744, the same year his oratorio "L'errore di Salomone" was staged. Burney, scorned the music of "Roselinda" as "wild, awkward, and unpleasant; manifestly produced by a man unaccustomed to write for the voice, and one possessed of a "capo pazzo"", and ridiculed the inclusion of the ballad tune as an attempt "to flatter the English" that failed because "few of the North Britons, or admirers of this national and natural Music, frequent the opera, or mean to give half a guinea to hear a Scots tune, which perhaps their cook-maid Peggy can sing better than any foreigner", but confessed that "This opera, to my great astonishment when I examined the Music, ran twelve nights", whereas "L'errore di Salomone" was given only twice. Veracini left London a little more than a year later.