I jumped right in, drawing this odd-looking rock with black ink in a calligraphy pen and brush pens with Lexington gray and brown inks . . . then wished I had first plotted the shapes out with a pencil. Not very accurate, and the gray and brown inks went down a bit too dark. Afterwards, I added a bit of buff titanium watercolor and some white gel pen.
I found the rock among the river rocks at the edge of our patio --- it immediately brought to mind The Scream painting by Edvard Munch.
And this is the final sketch in this small Field Notes Memo Book. It came in a set of three; the others are a muted red and a turquoise blue.