Ernst Wiesner, who was a circuit overseer in Germany at that time, described some of the security measures: “Two brothers went ahead and whenever they met anyone, they at once signaled with their flashlights.
એ સંકેત મળતા, આશરે ૧૦૦ મીટર પાછળ ચાલતા ભાઈઓ, થેલા સાથે ઝાડીઓમાં સંતાઈ જતા.