Beware of Female Spies
Women are being employed by the enemy to secure information from Navy men, on the theory that they are less liable to be suspect than male spies. Beware of inquisitive women as well as prying men.
Concerning any matter bearing upon the work of the Navy
Silence is Safety
International Spy Museum
A World War I poster warned Navy personnel to guard against the wiles of female agents.
postmarked in 2010 with a 28 cent polar bear stamp