The New York Times and the New York Herald Tribune were
examined for each day of the period studied. Supplementary material
and additional insights were drawn from other major dailies and a
multitude of local papers representing all parts of the country. At the
British Museum the files of the Times of London and the Daily
Express were helpful for an appraisal of English sentiment. Further
information was obtained by scrutinizing such magazines as Time
and Newsweek, as well as The Nation, The New Republic and other
journals of opinion. Such partisan publications as The Republican
contained helpful material.

A publication of the United States Department of State, Docu-
ments on German Foreign Policy, Series D, Volume X ( Washington,
D.C., 1949), exposes the correspondence between Hans Thomsen
and the German Foreign Office. Closely related to this topic, two
recent books have also clarified the extent of German activity in the
United States during 1940. They are: Alton Frye, Nazi Germany and
the American Hemisphere, 1933-1941 ( New Haven, Connecticut:
Yale University Press, 1967), and James V. Compton, The Swastika
and the Eagle ( Boston: Houghton Mifflin Company, 1967).

A helpful contemporary investigation of Nazi sympathizers in
America is John Roy Carlson Undercover ( Philadelphia: The
Blakiston Company, 1943). For an intelligent reconsideration of an
intriguing subject see Manfred Jonas, Isolationism in America, 1935-
1941 ( Ithaca, New York: Cornell University Press, 1966). Also

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