What is an example of metaphor in School for Scandal?

"a neat rivulet of text shall meander through a meadow of margin" (p.32) (Metaphor)

In this quote, Benjamin Backbite describes the way his writing will look when published, in an attempt to woo Maria. As a poet, he uses figurative, lyrical language to describe his writing. Here, he compares his poetry to a stream running through a meadow, attempting to highlight both its length and its beauty.