[453-14] Fall fellowly drops means shed tears in sympathy.
[453-15] Rising senses means clearing mental faculties.
[453-16] Ignorant fumes that mantle alludes to the confusion that the charm has caused in their ideas. The whole passage means simply that they are recovering their senses.
[453-17] This sentence means, I will reward thee to the utmost.
[453-18] Remorse here means pity.
[453-19] Nature here means brotherly love.
[454-20] The reasonable shore means the shore of reason. As the tide rises to the shore of the sea, so their clearing thoughts fill their minds.
[454-21] Discase me means remove my disguise.
[454-22] As I was sometime Milan means as I was once, the Duke of Milan.
[454-23] The meaning of the three lines preceding has been much disputed. No one knows exactly what the poet meant. Perhaps Ariel sings with this meaning: “When the owls cry and foretell the approach of winter, I fly on the back of a bat in a merry search for summer.”