This book provides an annotated source edition of the only two extant documents related to the sorcery trial brought against Pes de Guoythie and Condesse de Beheythie in Lower Navarre, in 1370. It provides full transcriptions of both documents, and English translations of the most salient passages. These sources illustrate at an early date many of the features prevalent in later sources on which trials, such as the metamorphosis of those accused into animals; infanticide; poisoned apples; collective meetings; and ointments made from various creatures. As such, it offers a fascinating insight into allegations of witchcraft in the High and Late Middle Ages.