Carter’s rank was still captain at this point. This (older) sketch was done using a liquid graphite pencil called Ingenuity, made by Papermate. It’s like drawing with a pencil that feels like a ballpoint pen. Definitely an interesting experience.
I don’t know if these “pencils” are still being made. I do know that I have 6 spare refills in addition to the two that came in the two “pencils” I have.