Its a good thing I had my Deluxe Swiss Army knife with me today. I was waiting for Joy in the beauty parlor, all ready to sketch but could not find my drawing pen anywhere. BUT, my Deluxe Swiss Army knife had a pen! It was nothing to speak of, just a ball point pen refill (a naked, thin barrel).
When I got home, I darkened some of the outlines with my regular pen-and-ink pen.