In January 1921, Sawyer met with Dr. Victor Heiser, the director of RF operations in the East. Heiser asked him to come along on a three-month tour of the RF public health sites in southeast Asia, and Sawyer agreed, though it meant missing the birth of his son (who arrived on March 23). His letters to his wife sometimes included his photos of places and people they visited, including activities of the hookworm campaign.
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