It is appropriate for us to continue our account of the actions of King Pedro of Castile against his brother King Enrique, starting at the point where we left off speaking about them. We do this so that you can have a brief acquaintance with everything and so that the sequence of this work of ours should not stray from the way in which it first began, particularly as we have nothing to relate about King Fernando prior to the death of the aforesaid King Pedro. Accordingly, you need to know that, having established the alliance with King Fernando of Portugal, King Enrique was fully informed of the many forces which the Prince of Wales was assembling to enter Castile with King Pedro. As these forces had no way through the mountains as good as the passes of Roncesvalles, which are located in the kingdom of Navarre, and as this could only be done with the good will of the King of Navarre, King Enrique strove to arrange a meeting with him and obtain an agreement that they should not be allowed through.

The outcome was that King Enrique and King Carlos of Navarre held a meeting at a frontier town called Santa Cruz de Campezo. There they paid homage to each other and drew up an agreement, in oaths taken over the Sacred Host and in the presence of many noblemen, whereby the King of Navarre would not permit the prince or his forces to make their way through the passes. Were they to force their way through, which he deemed impossible, he himself and all his own forces would enter the battle in support of King Enrique. To guarantee his promise, he offered as surety three castles on his own territory, namely Guardia, San Vicente and Buradón, which would be held by Don Lope Fernández de Luna, Archbishop of Saragossa; Sir Bertrand du Guesclin, a great French knight who was supporting King Enrique; and Juan Ramírez de Arellano. King Enrique undertook to give to the King of Navarre the town of Logroño, in return for the help that he had promised and for defending the passes against King Pedro and the prince.