British Secret Service During the Great War
CHAPTER IV
INTER-COMMUNICATING WITH TEMPORARY CODES AND INCIDENTS
GRAMMATICAL CODE--A TÊTE-À-TÊTE--CONFIDENCES--MISCONSTRUED MESSAGE LEADS TO DOMESTIC TRAGEDY--LOCAL CODES--AN ALTERED MESSAGE--AN IMPORTANT MISSION--SHADOWED--ATTEMPTED THEFTS OF PAPERS--A CONTRETEMPS--LEAKAGE OF NEWS FROM ENGLAND--WATCHING A SUSPECT--FALSE MESSAGE DISCLOSES AN OPEN CODE--GEOMETRICAL CODES--THE KNOT CODE--A FASCINATING ACTRESS, A CONFIDING ATTACHÉ, AND A MYSTERIOUS CHESS PROBLEM--CLEVERNESS OF FRENCH SECRET SERVICE 82