ILLUSTRATIONS
 PAGC
Luis de Onis, Spanish Minister to the United States from 1809 to 1819.
 From a Portrait in the Possession of Professor Federico de Oni
 Frontispiece
Map to Illustrate the Negotiation of the Adams-Onfs Treaty......facing 64

John Quincy Adams, Secretary of State from 1817 to 1825. From a Por-
 trait by Thomas Sully, Reproduced by Courtesy of the A. W. Mellon
 Educational and Charitable Trust..........................facing 88

Despatch of Onsf to the Secretario de Estado Announcing the Signature of
 the Treaty. From the Archive Hist6rico Nacional, Madrid......facing 164

 "Map of the United States with the Contiguous British & Spanish Poe-
 sessions, Compiled ... by John Melish. ... Improved to the 1st of
 January 1818." From a Copy in the National Archives.........fcing 216


 ABBREVIATIONS

 A.G.I.: Arehivo General de Indis, SeviIla
 A.G.S.: Arehivo General de Simaneas, Simaneas
 A.H.N.: Arehivo Hist6rieo Naeional, Madrid
 A.M.A.E.: Arehives du Ministare des Affaires Etrangres, Paris
 A.M.E.: Arehivo del Ministerio de Estado, Madrid
 A..P., .j.: Americans tate Papers (Washington, 1832-1861), Class I, For-
 eig Belations
 B.N.M.: Biblioteea Nacional, Madrid, Seeei6n de Manuseritos
 D..: Division of State Department Archives, the National Archives, Wash-
 ington
 P.BLO., P.O.: Public eeord Ofiee, London, Foreign Omee Papers

 These abbreviations are employed in the notes. Arabic numerals after
 "A.GI.," "A.G.S.," "A.H.N.," and "A.M.E." represent legajo bundlee) num-
 bers. Arabe figures are used to indicate volumes after "A.M.A.E." Two sets
 of Arabic numerals after "P..O., P.O." denote series and volume, respee-
 tively. Boman numerals after "D.8." indicate volumes.