Margaret (Peggy) Wilson, born in England in 1897, was the model of the new woman, serving as a medical volunteer during World War I, and later going to medical school to become a doctor of tropical diseases.
In 1926, Peggy traveled to Kathmandu, and four years later married her friend from medical school who was on assignment with the British Colonial Medical Service in Tanganyika (modern-day Tanzania).
Peggy and Donald spent the next 30 years working side-by-side on malaria research and public .