"In one of the books written in the United States about the
attack on Pearl Harbor, the author deemed it unlikely that such
important information would have come to the attention of the
Minister of Peru while escaping the notice of secret agents of
the American Embassy in Tokyo.  What is certain is that without
looking for it and without having an intelligence service
(information regarding), the initial Japanese preparations for
the surprise attack on the American naval base came to the
attention of Dr. Rivera Schreiber.

"The information received by the Minister about this plan
extended over a period of two months.  During that period he
gradually gathered the data which his domestic servant sponta-'
neously supplied him which coincided with the trips to Tokyo of
the employee of the Peruvian Consulate in Yokohama.  Initial
information had it that the Japanese squadron would, in a surprise
move, sink the American squadron;  according to a second report the
operation was to take place in the central Pacific;  [and] according
to a third report it was to be carried out by aircraft.  At first
he3/ hesitated to lend credence to such information, which seemed
fantastic [and appeared to be] an outgrowth of patriotic Japanese
fervor.  He was fully convinced only when a Japanese friend, an
interpreter of the War Ministry, a Professor of Spanish Literature
at the University of Tokyo and a man inclined to oppose militarism,
in the excitement of a dialogue, confided to him -- about January
26, 1941 -- that he had proof that at that very time aircraft car-
riers of the Japanese squadron were steaming toward southern Japan
with a view to beginning tests for the air attack which they were
planning [to carry out] against the American squadron at Pearl
Harbor and that they would use a small Japanese island for those
tests.  Such definitive and precise information, which coincided
in every respect with the data received from the other source,
persuaded him of the probability of the attack on Pearl Harbor.
Moreover, months later, as shown in the memoirs of Secretary of
State Cordel[l] Hull, the Japanese Government's secret cables to
its Embassy in Washington -- decoded by the American services --
confirmed that that very day the simulated attacks referred to by
the Japanese informant were carried out.

"Without wasting a minute, he personally telephoned Mr. Joseph
Grew, United States Ambassador in Tokyo, and they agreed to meet
immediately.  The conversation took place in Mr. Grew's office at
the American Embassy residence.  They sat down on a small sofa
and chatted for more than an hour during which the Minister of
Peru scrupulously related to him the details of the important
information.  The American Ambassador appeared to be quite moved
by and immensely grateful for this friendly gesture and literally
said, 'This is a great service you are rendering to my country

3/ Tr.:  Supra.