Francis Buchanan was a Scottish physician, naturalist, and surveyor known for his contributions to understanding Indian society under British rule. His surveys in Bengal and Bihar provided detailed insights into the socio-economic conditions of rural India, including agriculture, local industries, and social structures. His work documented the richness of Indian flora, fauna, and cultural practices. The Buchanan Report is considered a valuable historical source for understanding India's socio-economic conditions during colonial rule. His meticulous observations contributed to the colonial administration’s understanding of rural India.