AUTHORITIES.--The chief authorities for Zizka's campaigns and organisation are Æneas Sylvius, Balbinus, _Miscellanea Rerum Bohem._ 1679; Dubravius, _Hist. Bohem._ 1602; Palacky, _Gesch. v. Böhmen._ His articles of war will be found in _Neuere Abhandlungen der königl. Böhm. Gesellschaft der Wissenschaft_, Band I. p. 375. For the Swiss, Simler, _de Repub. Helvet_; John of Winterthur, Pirckheimer, and the _Chronicle of Berne_. All the authorities for the battle of Sempach have been collected in Liebenau's memorial volume. A fantastic work, but not without useful information, is Karl Bürkli's _Der wahre Winkelried_, 1886. Köhler has handled both Bohemians and Swiss with his wonted thoroughness. For the landsknechts there are Adam Reissner's _Georg von Frundsberg_ (1st ed. 1568, 3rd ed. 1620); Fronsperger's _Kriegsbuch_; Hortleder's _Der römischen Kaiser_, etc.; _Adelspiegel_, von Cyriack Spangenberg, 1594; the whole of which are more or less summarised in Barthold's _Georg von Frundsberg_, 1833, and in a still more compact form by Dr. Friedrich Blau, _Die deutschen Landsknechte_, 1882. The Spanish military reforms are more difficult to ascertain. I have relied principally on Roger Williams's brief account, sundry notices in Brantôme's _Vie des hommes illustres_; Paul Jove's _Vita Gonsalvi Magni_, and, perhaps most valuable of all, Reissner. For the French there are Daniel's _Ancien milice_; Susanne's _Hist. de l'ancienne infanterie française_; Paul Jove, and the _Memoires_ of Vieilleville, Du Bellay, Villars, de Mergey, de la Noue, Tavannes, Onosandre, Brantôme, Monluc, and others. I have also consulted, among Italian writers, Julius Ferrettus, _De re militari_, 1575; Domenico Mora, _Il soldato_, 1570; Savorgnano's _Arte militare_; and of course Machiavelli. Lastly, I have not failed to study the classical authorities quoted in the text. CHAPTER II