This book measures Portugal's transatlantic projection of power against a particular obstacle: imperial information-gathering, which produced a confusion of rumors, distortions, claims, conflicting reports, and disputed facts. Drawing on interdisciplinary scholarship in the fields of ethnohistory, slavery and diaspora studies, and legal and literary history, Hal Langfur considers how misinformation destabilized European sovereignty in the Americas, making a major contribution to histories of empire, frontiers and borderlands, knowledge production, and scientific exploration in the eighteenth and nineteenth centuries.