ARRESTING A POLICEMAN.
Some time it may become necessary to arrest a policeman; and in that event, all you have to do is to carry out the following instructions with celerity and precision.
Get on his left side, a little at the rear, (1) with your right hand catch hold of the lower end of his club which hangs in his belt at the left side, and turn it outward to the left and upward, so that it will bear across his left arm just above the elbow; while you are doing this with the right hand, catch hold of his left wrist with your left hand, holding his arm back against his club, to keep it straight, and with your right hand push the top end or handle of the club against his left side, just above, and slightly in front of the pelvis bone on No. 11, ill. A., as per illustration. This hurts terribly in two places; the middle of his arm and at the end of the club in his flank. Be careful of the latter point. It is one of the knock-outs of JIU-JITSU and apt to cause collapse.
The writer asked permission to try this experiment, just for practice, on a New York policeman, and after grasping his left wrist and turning up the club in the above manner, as if it were one motion, the officer was asked what there was for him to do in a case like that. He replied, between gasps of pain, that there was nothing he could do without breaking his arm or killing himself.
From Jiu-jitsu: A Comprehensive and Copiously Illustrated Treatise (1904), p. 63-64, by Harry Hall Skinner.