included as determined by travel orders (5): Whitworth College, Brookhaven, Mississippi
in November 1918, Baltimore, Maryland in December 1918 (followed by a 10 day leave
of absence), and Springfield, Illinois in January 1919. His instructions January 18, 1919
for the Springfield, Illinois field study (5) were as follows: “Under authority of Bureau
letters of November 9 and December 18, 1918 you are herewith instructed to proceed to
Springfield, Illinois to confer with the Commissioner of Health of that State relative to
the census of influenza in certain localities in Illinois to be undertaken by the State
Department of Health.
“As the State Department of Health is undertaking to make its surveys uniform
with those of the Public Health Service, you will consult with them in regard to
coordinating all necessary details.
“Upon completion of this duty you will return to Baltimore to continue your
duties there.
“Authority for your travel under these instructions is contained in the Bureau
letters above cited. Respectfully, W.H. Frost, Surgeon in Charge” (5).
On February 17, 1919 (5) he received orders after completion of his duties in Baltimore
to proceed to Dr. Frost’s office in Washington, D.C. for further temporary duty in
connection with investigations of influenza. On March 8, 1919 Dr. Frost instructed
Armstrong to proceed to LaPlata, Maryland and other localities in Charles County,
Maryland for the purpose of collecting special data relative to the prevalence and
mortality of influenza in that County (5). Upon completion of this duty he was to return
to Dr. Frost’s office. If necessary, Armstrong was to return to Washington, D.C. from
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