Beside being gerunds, they connect by moving us toward and through image and sound. As if exercising some form of inherent punctuation, a physical object invites us to linger – to see and re-see. Words, being read, have as their locomotion (not in every language, of course) a left to right destination, propelling us along a straight line of sound. Of course, in poetry the straight can curve, wobble and/or stop, rather abruptly.
Along the way – pavement and print -- much to see. Much to hear.
Consider food in the context of walking and reading. I walk to market on the way to the library. I read a lot of c-books (cook & children’s). Children’s picture books are a journey and meal onto themselves. An on-the-spot picnic.