Bernal Diaz' book is a gem, but by no means the only first person account of the conquest. Cortez in his long letters (Relations)) to Charles V, and an anonymous history by "The Unknown Conquistador" are both eyewitness accounts. One thing concerning Diaz del Castillo seldom mentioned is that he was apparently a sorcerer. He wrote that he was forewarned of the Noche Triste, among other event, by a "familiar spirit".
Bernal Diaz’ book is a gem, but by no means the only first person account of the conquest. Cortez in his long letters (Relations)) to Charles V, and an anonymous history by “The Unknown Conquistador” are both eyewitness accounts.
The history by The Unknown Conquistador is much shorter, and does not really cover Cortez’ campaign, just a small portion.
At least that was how they were described when I read of them.