General Directorate of Archives and Libraries. House of the Dukes of Frías. Madrid, 1955. Dedication by the Duke of Frías in Volume II. Volume I - Velasco House. Inventory compiled by María Teresa de la Peña Marazuela and Pilar León Tello. XXVIII + 607 pp. + XXII plates. Volume II - Pacheco House. Inventory compiled by Pilar León Tello. XI + 430 pp. + XII plates. Ex-libris stamped by previous owner. Removed from library records.
