Note * — Chapter XXVIII · The Allusiveness of Modern Poetry
Reading edition
The difference is difficult to describe except perhaps: by the aid of a musical notation. It is like the difference between two voices, and in spite of the highly characteristic matter* of the lines, the reader feels that not Shelley but some other poet is speaking. What Shelley is doing becomes unmistakable in the third and last stanza. The corresponding lines, again in clear contrast with the lines surrounding them, have the same strange modulation: