Brooks: Diplomacy and the Borderlmds 221

obscure items, and for those that have been well known simply to
indicate their value in this study. The references have been listed
according to the following arbitrary classification with respect
to type:
 A. Manuscripts
 B. Printed materials
 1. Documents
 2. Periodical matter
 a) Contemporary
 b) Later and recent
 3. Memoirs and biographies
 4. General works and special treatises
 C. Maps
 A. MANUSCRIPTS
With four countries directly concerned, and numerous individuals
figuring prominently, the files of papers run into many thousands
of pages. Most of them are well preserved, and with one exception
the archives and libraries cited were open and the materials easily
accessible at the time of my study. I am informed that the Archivo
Hist6rico Nacional at Madrid was not damaged during the recent
siege there. In the Spanish archives the manuscripts are kept in
bundles of several hundred pages each, known as legajos. These
are frequently divided into expedientes, small files of records
from various sources assembled at the time of their use as treating
certain subjects at hand. Nearly all the other collections listed
which are in libraries or archives are in the form of bound volumes
of manuscript.
 A number of selections of this material have been published for
 one purpose or another. For the official correspondence of the
 various governments, however, thoroughness has required direct
 reference to the originals, and they are accordingly cited in the
 notes. The one notable exception to this practice is the reference
 to the Americn State Papers for such of the Adams-Onis and
 Pisarro-Brving correspondence as is printed there with reasonable
 completeness.
 Various guides and indexes accessible to competent investigators
 in the archives and libraries have not been listed. Special attention
 should be directed to the series of guides to materials for the his-