"Memoir on the cultivation of cotton and its export, on the decline of cassava agriculture in the municipality of Camamu, district of Illeos, province of Bahia" is a witty and detailed scholarly work written by the enlightened historian and agronomist José de Sá Bettencourt. In this book, he explores important aspects of Brazil's agricultural sector, particularly the cultivation of cotton and cassava, and their impact on the economy and society of the Camamu region. Bettencourt reviews the historical context and economic implications of the cultivation of these crops, examines their importance to Bahia's export sector, and outlines important agricultural reforms. This work serves as an important source of knowledge for historians, agronomists and anyone interested in agrarian issues in Brazil in the 19th century."