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 describe in detail the rigors of traveling and his reactions to other cultures, as well as the activities of the hookworm control campaigns.
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