TheCodeBreakers
letters; most of these turned out to be merely personal notes in very
simple systems, though some of the love letters were so torrid that
Yardley said, "It rather worried me to see husbands and wives trust their
illicit correspondence to such unsafe methods."
Perhaps the most important of the MI-8 solutions was the one that
largely resulted in the conviction of the only German spy condemned to
death in the United States dur-
ing World War I. This was Lothar Witzke, alias Pablo Waberski, who
was suspected of setting off the Black Tom explosion. He was captured in
January, 1918, by an American agent, who found in his baggage in the
Central Hotel in Nogales, Mexico, a cipher letter dated January 15. It did
not reach MI-8 until spring, and then it kicked about for a few more
months while several men there tried and failed to solve it. Finally Manly
took it up.
This quiet scholar, who never married and whose quiet, simple
annaabi.ee 
