[Footnote IV.21: Sensible in grief] Poignantly affected with.
[Footnote IV.22: You must sing Down-a-down,] This was the burthen of an old song, well known in Shakespeare's time.
[Footnote IV.23: How well the wheel becomes it!] This probably means that the song or charm is well adapted to those who are occupied at spinning at the wheel.
[Footnote IV.24: There's rosemary, that's for remembrance;] Rosemary was anciently supposed to strengthen the memory, and was carried at funerals and wore at weddings. It was also considered the emblem of fidelity in lovers; and at weddings it was usual to dip the rosemary in the cup, and drink to the health of the new married couple.