A typographic river dark and wild
What it illustrates is something to check for on your typeset pages. The typical river consists of white space that travels down a paragraph from line to line, opening up a channel. But you also need to watch out for the darker sort of river seen here. Did you see it? If you’re not accustomed to thinking in terms of the color of the page, it may not jump out at you. Look at the word mortgage, running down the center of the image.