Between 1 June and 1 August 1508, the newly refounded tribunal, known to history as the Spanish Inquisition, was subjected tojudicial investigation by a ‘General Congregation’ at Burgos, in Old Castile. The process resulted from the activities of Diego Rodriguez Lucero. As inquisitor of Córdoba, he was accused of making false charges of ‘judaising’ against conversos, or converts from Judaism and/or their descendants, and ‘Old Christians’ alike. During the Congregation's examination of his work, many of the tensions and difficulties which had arisen in Spanish society as a result of the Inquisition's work were exposed. To date, the only detailed consideration in English of Lucero's rise and fall - published in 1897-has been that of the great liberal Protestant historian of the Inquisition, H. C. Lea. As ever, his work was solidly based on the best early printed sources, but also on documents from the Castilian national archives at Simancas and the cathedral archives in Cordoba itself, as well as other places. In recent years, however, many more documents have come to light, which make possible a more profound and thorough investigation of the Lucero affair. Progress towards increased knowledge has not, however, been uninterrupted. Many of the manuscript sources in the Cordoba Cathedral archives to which Lea refers are no longer traceable, having, in some cases, been torn from their bindings; others have simply vanished. Such, it appears, is the degree of passion which the name of Lucero still inspires.