Salazar gathered about 11,000 pages of evidence during his review of the Basque witch-trial accusations.
The material came from an intensive investigation ordered by the Supreme Council of the Spanish Inquisition. In 1611, Salazar traveled through Navarre, especially around Zugarramurdi near the French border, collecting statements and checking claims about witches’ sabbaths, magical substances, and alleged accomplices.
The scale of the dossier reflected the panic rather than the strength of the case. Nearly 2,000 people gave supposed confessions, including 1,384 children, and those statements implicated thousands of others. Most later retracted their allegations, often saying that pressure, threats, or fear had shaped what they said.
Salazar compared testimonies and looked for physical confirmation. Accounts conflicted about locations and events, while supposed ointments and powders proved harmless. The resulting 11,000-page record gave the Inquisition an unusually broad empirical basis for rejecting mass prosecutions. The figure refers to the accumulated evidence, not to the number of accused people or pages in a single report.