Manuscripts and lecture notes on Southeast Asia include: The Industrialization of Agriculture in Southeast Asia; Labor Conditions in Southeast Asia, Freedom of Person, The Shadow of Unfreedom, By A Javanese Roadside, Netherlands India - Masterpiece of the Colonial Era, Indonesians are People, and Java Jottings. Also, notes and interviews for his South China Study, 1934, relating to economic conditions and emigration in China; "Chinese Emigration and Chinese Communities Overseas: Quotations and References;" and "Southeast Asia: 1918 to 1944."