This week I came across an interesting map of a portion of Zambia. It is a sort of “rough draft” for this series of topographic maps. These maps were drawn from pictures taken from a plane. Then these photographs were sketched before the additional information was added. With today’s technology it is remarkable to think of how many iterations were done by hand. Something that can now so easily be done with computers. But here is an artifact from the original process sitting in front of me in 2019, 50 years after this pencil drawing.