Gutierre Diaz de Gamez entered the service of Pero Ni o, count of Buelna, in 1402, when they were both about 23, and served as head of his military household for nearly fifty years. He began a chronicle of his master's deeds in about 1431, and it is this eyewitness account of the life of a knight, both in war and peace, which is translated here. It is written in praise of his master, but beneath the veneer of hero-worship a good deal of the reality...