I'd be a Butterfly

I'd be a butterfly
I'd be a butterfly

I've been reading a book about Jack the Ripper, set in Victorian England (naturally) and written from the point of view of a music hall performer.

 

When she mentioned singing "I'd be a butterfly" I felt I should look it up.  Originally a poem, written by Thomas Haynes Bayly in the early 19th century, it was later turned into a song 

 

Not sure Bayly would have expected it to be visualised thus.