[19] Ribeiro da Silva, “Crossing Empires: Portuguese, Sephardic, and Dutch Business Networks in the Atlantic Slave Trade, 1580-1674,” 22. For the seventeenth-century trade in logwood, slave labour is mentioned e.g. in Cardon, Natural Dyes, 266-267; Joseph, “British Loggers and Spanish Governors: The Logwood Trade and Its Settlements in the Yucatan Peninsula: Part I”.