an engineer with a Ph.D in chemistry, was an
employee of the Bureau of Standards, the source
of a number of government documents contained
in the Pumpkin Papers
that Whittaker Chambers said were given to him
for transmission to Moscow.
the contents of the Pumpkin Papers were revealed,
it was found that the material from the Bureau
of Standards were Navy Department documents
that were publicly available (dealing with such
matters as the recommended color to paint fire
extinguishers owned by the government) and would
have been of no interest to the Soviet Union.
in December 1948 before the grand jury investigating
espionage, Pigman denied handing any documents
over to Chambers, saying he had never met him.
He also denied being a member of the Communist
Party or being associated with it, and described
himself as a moderate Democrat.
released grand jury minutes reveal that Pigman
was repeatedly threatened with perjury charges,
but Pigman maintained his story and was not