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Rh were snapped up and read with avidity. Treatment of these issues was found to influence enlightened German opinion more than any other kind of propaganda.

From time to time special topics were selected. For instance, a series of "London Letters" was sent to Swiss and Scandinavian papers purporting to be written with a pro-German flavour, but containing, under this disguise, a true picture of food and other conditions in Great Britain. It was gratifying to find these reprinted in enemy papers, for the German reader was thus led to institute mental comparisons with the much worse conditions prevalent in Germany. Secret means, too, were found to circulate in German naval ports, as a deterrent to men picked for service in submarines, leaflets (of which a reproduction appears in this volume) containing a long list of U-boat commanders, dead or captured, with description of their rank. Particulars so easy of verification proved the mastery of the British Navy over the U-boat campaigners and created great depression in the German ports.

In addition to the "priority" leaflets containing news of Allied successes, illustrated with shaded maps and diagrams, a