The author describes a strange woman, named Vespertilia, and the beach where they met. She professes her love for the author, but is denied because the author's true love has died. Vespertilia then disappears, and the author is left remembering her better than their true-love.
John Gambril Nicholson published this poem in his collection, Love in Earnest: Sonnets, Ballades, and Lyrics. He wrote it to describe and admire all of the different types of boys that he encounters when walking through London.
White, Chris. Nineteenth-Century Writings on Homosexuality: A Sourcebook. Routledge, 2012.
Google Books, https://books.google.com/books?id=RQmoCHR0BZ0C&printsec=frontcover#v=onepage&q&f=false