26 JUNE 1920, Page 24

The Secret Corps. By Captain Ferdinand Tuohy. (John Murray. 78.

6d. net).--Captain Tuohy's " tale of ' intelligence ' on all fronts " may be described as the complete manual for the writer of spy stories. He deals with all the methods of espionage and counter-espionage practised during the war, enlivening his exposition here and there with anecdotes. He explains inciden- tally the value of seemingly harmless military details to an alert enemy and thus justifies the censorship. He declares that our own system proved highly efficient and that our French Allies had, after February, 1916, to implore the assistance of our secret service in Germany as all their own agents had been captured. The British system was based on the principle that each agent should know and be known to his chief alone. It often happened that one agent would complain to headquarters against another agent whom he wrongly suspected of being an enemy spy. The author asserts that we had a secret agent on the staff of Prince Rupprecht throughout the war. " Intelligence," he thinks, was often hampered through the unwillingness of generals to profit by it. Captain Tuohy's book will be read with keen interest.