From :Birds of Prey # 13, page 13, original panel 4
This doesn't quite qualify as "pencil-to-ink study", but rather an inker contributing art corrections. Besides, I couldn't think of a more appropriate page to put this on. On our last two issues of B.O.P., Greg shared pencilling duties with Patrick Zircher. I inked both to maintain consistency, but I received the pages out of order. I inked Patrick's pages (11-15) first, and sent them to then-editor Joe Illidge. When I started inking Greg's pages (1- 10), I was confused about the panel where a trenchcoated alien got cut in half by a shotgun, then scrambled away using it's arms, leaving the legs behind. A quick look at Chuck Dixon's script requested exactly that. so...
Penciller: Patrick Zircher
 
From :Birds of Prey # 13, page 13, revised panel 4

    For the sake of time, Joe and I agreed that I should fix this glitch. Since I kept photocopies of everything, I cut and pasted a redrawn exoskeletal torso, losing the legs, showing more of the tattered raincoat. These kinds of repair jobs are fun, time permitting. I don't recall, but I believe Patrick's page said only that Black Canary and Catwoman come across the remains of the alien's exoskeleton. Most scripts are obviously intended for one penciller, so this was an understandable continuity slip. Pat's another artist who deserves more hype, because he drew incredibly detailed battle scenes on Apokolips in this story.

Additional Pencils and Inks: Drew Geraci
 
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