Licenciado (lawyer) Diego Enríquez del Castillo (1431-1503) was a chronicler, chaplain, and royal advisor. The collection includes a holographic volume that chronicles the life and achievements of King Henry IV of Castile and León. Enríque del Castillo wrote it in 167 titled chapters and concluded it with "Finis, Laus Deo."
The volume is bound in vellum.