PART I. THE SURVIVORS 1. Introduction On May 25, 1989, the United States celebrated the 450th anniversary of the landing of Hernando de Soto and his host on the western shores of Florida. De Soto's was the longest and most detailed exploration of the southeastern United States conducted some eighty years before the Mayflower reached Plymouth Rock. For this celebration it is appropriate to know, with the best possible certainty, who survived this four year and two month journey which traversed ten present-day states. With that purpose this work presents a register of those who accompanied Hernando de Soto, the Adelantado de la Florida, until his death on the banks of the Mississippi River and afterwards followed its currents to the Gulf of Mexico and beyond. Fifty three years ago President Franklin D. Roosevelt appointed anthropologist John R. Swanton to the United States De Soto Expedition Commission. Swanton delivered his report to the House of Representatives in 1938, covering all aspects of the de Soto expedition.1 This report included a list of the participants compiled from the writings of the four known contemporary chroniclers of this expedition, a few original documents published in the nineteenth century, and a transcription of the passengers registered in Spain to proceed to Florida via Cuba.2 Swanton's archival research was interrupted by the Spanish civil war. His practice of adding the persons found in the cited sources did not take into account those who sailed from Spain but did not continue beyond Cuba, nor all those who were added in Cuba.