Persons who are known to have used Einstein’s address or who were
aware of the fact that Einstein’s address was being used are Richard
Grosskopf, Adolf Sauter, Friedrich Burde, Wilhelm Bahnik, Johannes
Liebers, Wilhelm Zaisser, Karl Hans Kippenberger, Alfred Kattner, Wil-
helm Wloch, Dr. Guenther Kromrey, and Herrmann Duenow. Of these the
only persons known to be alive are Grosskopf, Sauter, Zaisser, Wloch,
Kromrey and Duenow. The others were either executed, are missing, or
died in Spain.
Einstein was closely associated with the ‘‘Klub der Geistesar-
beiter’’ and was very friendly with Fritz Eichenwald, Dr. Bobeck,
1040
Dr. Caro, Dr. Hautwermann
1041
and Dr. Kromrey, who were all members of
the Club and who later became agents of the Soviets. Also associated
with this Club were the two Fuchs brothers, both of whom were stu-
dents at that time. One of the Fuchs brothers worked for the Communist
Party MD and in 1934 was associated with the Abwehr Apparat of the
Landesleitung Berlin-Brandenburg.
1042
He left Germany in 1934 or 1935
for Switzerland. The other Fuchs brother was Klaus Fuchs, who was as-
sociated with Apparat Klara
1043
and worked with Fritz Burde, and later
with Wilhelm Bahnick. Klaus Fuchs was recently jailed in England for
giving the Soviets A-Bomb information