Juan Gallo de Andrada, a scribe in the royal chamber, affirms his role in certifying documents related to important texts. He specifically mentions a significant book, which is the famous tale of Don Quijote de La Mancha, written by the acclaimed author Miguel de Cervantes Saavedra. His position suggests that he is responsible for maintaining records that pertain to the kingdom and its literature.

This statement indicates the recognition of Cervantes' work during its time, highlighting its importance in the literary landscape. Gallo de Andrada's acknowledgment provides an official confirmation of the book's existence and perhaps its value within the cultural and historical context of Spain.