Your sense of composition is great with the Detroit scene. Love the graphic balance between black and white (this shows up in your political cartoon earlier too. Marvelous handling of hatching. Try thinking your pencil drawings this way too, just breaking up the areas of light and shadow and thinking abstractly. Don't try and draw an eye, hand, etc. Just draw the shapes. It's a great exercise. I think you'll be a natural at it, judging from your inks.
"The progress of learning is from indefinite to definite, not from sensation to perception. We do not learn to have percepts but to differentiate them."