TheCodeBreakers
..." A letter of six
days later, addressed to a Miss Isabel Machado Santos in Lisbon,
reported in invisible ink that "British have about 70,000 men on Iceland
# The S.S. Ville de Liege was sunk about April 14—many thanks # Types
of airplanes flown to England (continued from letter 69) —3. Boeing B-
17c (model 299x) twenty were released by the U.S. Army to Britain on
Nov. 20. . . ." These little billets-doux were written in a solution of
pyramidon, a powder often used as a headache cure and readily
obtainable at most pharmacies.
But there was still no clue as to the sender. The letters bore no return
address, and it was rather unlikely that "Joe K" was the spy's real first
name and last initial.
Z7b THE COUEBKEAKtKS
Finally, British censorship picked out another Joe K letter that
reported that "Phil" had been fatally injured in a New York traffic
accident on March 18 and had died at St. Vincent's Hospital. F.B.I,
annaabi.ee 
