Military Grafitti

For some time I'd speculated that the arrows found on some trees were military in origin; I'd often seen them on trees near what I believe to be evidence of tank training in the forest. Although, increasingly I've seen them beyond wartime training areas. A recent conversation with a couple of old forest fellows shed further light on the question. The arrows are military marks, marks usually used by the Navy to identify timber; over a dozen or so have been identified so far.