Despite having enemies in the powerful Spanish religious orders, and being warned of the controversies that would arise, Erasmus published the fourth edition of his New Testament in 1527, resulting in a major crisis for Erasmianism in Spain. This period is marked by a bitter dispute between Erasmus and the conservative elements in Spain, involving behind-the-scenes manoeuvring, where it was impossible to distinguish friend from foe. Following this tension, a confrontation culminated in the Valladolid conference where enemies of Erasmus were obliged to come forward and where, following these events, Erasmus himself was forced to respond publicly to the charges brought against him.

The three texts in the present volume were written by Erasmus in response to his antagonists, and include An Apologia of Desiderius Erasmus of Rotterdam Against Several Articles Presented by Certain Monks in Spain, The Answer of Desiderius Erasmus to the Pamphlet of a Certain Fever-ridden Individual, and Letter to Certain Highly Impudent Jackdaws.