History of Denmark, Norway, and Sweden, from 1513 to 1900 ( 1905). There
is a convenient biography of Gustavus Adolphus by C. R. L. Fletcher in
the "Heroes of the Nations" Series ( 1800), and a more detailed study in
German by Gustav Droysen, 2 vols. ( 1869- 1870). On Wallenstein there
are two standard German works: Leopold von Ranke, Geschichte Wallen-
steins, 3d ed. ( 1872), and Anton Gindely, Waldstein, 1625-1630, 2 vols.
( 1886). The best brief treatment of European international relations in
the time of Richelieu and Mazarin is Émile Bourgeois, Manuel historique
de politique étrangère, 4th ed., Vol. I ( 1906), ch. i, ii, vi. For a brief treat-
ment of the development of international law during the period, see D. J. Hill
, History of Diplomacy in the International Development of Europe, Vol.
II ( 1906), ch. vii. The treaties of Westphalia are in the famous old com-
pilation of Jean Dumont, Corps universel diplomatique du droit des gens, 8
vols. ( 1726- 1731).

-234-