Mapmaking
Hendrickson started to learn mapmaking in Camp Parker, in Quincy, Illinois, but made great strides while at Camp Logan. Initially while at Camp Parker, Hendrickson wrote, "I am taking map drawing and the last 3 or 4 days I have walked 7 or 8 miles a day by myself, counting every step and jotting down every thing I come to. I am making road maps, showing road fences, all buildings and all crops I can tell from the road what they are" (September 3, 1917).
This level of detail is matched by his beautiful hand drawn map of Camp Logan, which has been used by a variety of modern researchers as one of the best maps of Camp Logan at this time. Hendrickson was an exceptionally skilled surveyor and artist, which is evidenced further by his sketches of the hospital he stayed in while in Europe, in Echternach, Luxembourg.
