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 deserves mention. The philosophical writings had been published by Raspe (Amsterdam and Leipzig, 1765), by J. E. Erdmann, ''Leibnitii opera philos. quae extant Latina, Gallica, Germanica, omnia'' (Berlin, 1840), by P. Janet (2 vols., Paris, 1866, 2nd ed. 1900), and the fullest by C. J. Gerhardt, Die Philosophischen Schriften von G. W. Leibniz (7 vols., 1875–1890); cf. also ''Die kleineren philos. wichtigeren Schriften'' (trans. with commentary, J. H. von Kirchmann, 1879). The German works had also been partly published separately; G. E. Guhrauer (Berlin, 1838–1840). Of the letters various collections had been published up to 1900, e.g.: C. J. Gerhardt (Halle, 1860) and Der Briefwechsel von G. W. Leibnitz mit Mathematikern (1899); Corrispondenza tra L. A. Muratori e G. Leibnitz (1899); and cf. Neue Beiträge zum Briefwechsel zwischen D. E. Jablonsky und G. W. Leibnitz (1899).

In 1900 it was decided by scholars in Berlin and Paris that a really complete edition should be published, and with this object four German and four French critics were entrusted with the preliminary task of correlating the MSS. in the royal library at Hanover. This process resulted in the preparation of the Kritischer Katalog der Leibnitz-Handschriften zur Vorbereitung der interakademischen Leibnitz-Ausgabe unternommen (1908), and also in certain other preliminary publications, e.g. L. Couturat, Opuscules et fragments inédits (1903); E. Gerland, Leibnizens nachgelassene Schriften physikalischen, mechanischen und technischen Inhalts (1906); Jean Baruzi, Leibniz (1909), containing unedited MSS. and a sketch-biography; cf. the same author’s Leibniz et l’organisation religieuse de la terre (1907).

Translations.—Of the Systema Theologicum (1850, C. W. Russell), of the correspondence with Clarke (1717); Works, by G. M. Duncan (New Haven, 1890); of the Nouveaux Essais, by A. G. Langley (London, 1894); the Monadology and other Writings, by R. Latta (Oxford, 1898).

Biographical.—The materials for the life of Leibnitz, in addition to his own works, are the notes of Eckhart (not published till 1779), the Éloge by Fontenelle (read to the French Academy in 1717), the “Eulogium,” by Wolf, in the Acta Eruditorium for July 1717, and the “Supplementum” to the same by Feller, published in his Otium Hannoveranum (Leipzig, 1718). The best biography is that of G. E. Guhrauer, G. W. Freiherr von Leibnitz (2 vols., Breslau, 1842; Nachträge, Breslau, 1846). A shorter Life of G. W. von Leibnitz, on the Basis of the German Work of Guhrauer, has been published by J. M. Mackie (Boston, 1845). More recent works are those of L. Grote, Leibniz und seine Zeit (Hanover, 1869); E. Pfleiderer, Leibniz als Patriot, Staatsmann, und Bildungsträger (Leipzig, 1870); the slighter volume of F. Kirchner, G. W. Leibniz: sein Leben und Denken (Köthen, 1876); Kuno Fischer, vol. iii. in ''Gesch. der neuern Philosophie'' (4th ed., 1902).

Critical.—The monographs and essays on Leibnitz are too numerous to mention, but reference may be made to Feuerbach, Darstellung, Entwicklung, und Kritik der Leibnitz’schen Phil. (2nd ed., Leipzig, 1844); Nourrisson, La Philosophie de Leibniz (Paris, 1860); R. Zimmermann, Leibnitz und Herbart: eine Vergleichung ihrer Monadologien  (Vienna, 1849); O. Caspari, Leibniz’ Philosophie beleuchtet vom Gesichtspunkt der physikalischen Grundbegriffe von Kraft und Stoff (Leipzig, 1870); G. Hartenstein, “Locke’s Lehre von der menschl. Erk. in Vergl. mit Leibniz’s Kritik derselben dargestellt,” in the ''Abhandl. d. philol.-hist. Cl. d. K. Sächs. Gesells. d. Wiss.'', vol. iv. (Leipzig, 1865); G. Class, ''Die metaph. Voraussetzungen des Leibnitzischen Determinismus (Tübingen, 1874); F. B. Květ, Leibnitzens Logik (Prague, 1857); the essays on Leibnitz in Trendelenburg’s Beiträge'', vols. ii. and iii. (Berlin, 1855, 1867); L. Neff, Leibniz als Sprachforscher (Heidelberg, 1870–1871); J. Schmidt, Leibniz und Baumgarten (Halle, 1875); D. Nolen, La Critique de Kant et la Métaphysique de Leibniz (Paris, 1875); and the exhaustive work of A. Pichler, Die Theologie des Leibniz (Munich, 1869–1870). Among the more recent works are: C. Braig, Leibniz: sein Leben und die Bedeutung seiner Lehre (1907); E. Cassirer, Leibniz’ System in seinem wissenschaftlichen Grundlagen (1902); L. Couturat, La Logique de Leibniz d’après des documents inédits (1901); L. Davillé, Leibniz historien (1909); Kuno Fischer, G. W. Leibniz (1889); R. B. Frenzel, Der Associationsbegriff bei Leibniz (1898); R. Herbertz, Die Lehre vom Unbewussten im System des Leibniz (1905); H. Hoffmann, Die Leibniz’sche Religions-philosophie in ihrer geschichtlichen Stellung (1903); W. Kabitz, Die Philosophie des jungen Leibniz (1909), a study of the development of the Leibnitzian system; H. L. Koch, Materie und Organismus bei Leibniz (1908); G. Niel, L’Optimisme de Leibniz (1888); Bertrand A. W. Russell, A Critical Exposition of the Philosophy of Leibniz (1900); F. Schmöger, Leibniz in seiner Stellung zur tellurischen Physik (1901); A. Silberstein, Leibnizens Apriorismus in Verhältnis zu seiner Metaphysik (1904); Stein, Leibniz und Spinoza (1890); F. Thilly, Leibnizens Streit gegen Locke in Ansehung der angeborenen Ideen (1891); R. Urbach, Leibnizens Rechtfertigung des Uebels in der besten Welt (1901); W. Werckmeister, Der Leibnizsche Substanzbegriff (1899); F. G. F. Wernicke, Leibniz’ Lehre von der Freiheit des menschlichen Willens (1890).

LEICESTER, EARLS OF. The first holder of this English earldom belonged to the family of Beaumont, although a certain Saxon named Edgar has been described as the 1st earl of Leicester. Robert de Beaumont (d. 1118) is frequently but erroneously considered to have received the earldom from Henry I., about 1107; he had, however, some authority in the county of Leicester and his son Robert was undoubtedly earl of Leicester in 1131. The 3rd Beaumont earl, another Robert, was also steward of England, a dignity which was attached to the earldom of Leicester from this time until 1399. The earldom reverted to the crown when Robert de Beaumont, the 4th earl, died in January 1204.

In 1207 Simon IV., count of (q.v.), nephew and heir of Earl Robert, was confirmed in the possession of the earldom by King John, but it was forfeited when his son, the famous Simon de Montfort, was attainted and was killed at Evesham in August 1265. Henry III.’s son Edmund, earl of Lancaster, was also earl of Leicester and steward of England, obtaining these offices a few months after Earl Simon’s death. Edmund’s sons, Thomas and Henry, both earls of Lancaster, and his grandson Henry, duke of Lancaster, in turn held the earldom, which then passed to a son-in-law of Duke Henry, William V., count of Holland (c. 1327–1389), and then to another and more celebrated son-in-law, John of Gaunt, duke of Lancaster. When in 1399 Gaunt’s son became king as Henry IV. the earldom was merged in the crown.

In 1564 Queen Elizabeth created her favourite, Lord Robert Dudley, earl of Leicester. The new earl was a son of John Dudley, duke of Northumberland; he left no children, or rather none of undoubted legitimacy, and when he died in September 1588 the title became extinct.

In 1618 the earldom of Leicester was revived in favour of Robert Sidney, Viscount Lisle, a nephew of the late earl and a brother of Sir Philip Sidney; it remained in this family until the death of Jocelyn (1682–1743), the 7th earl of this line, in July 1743. Jocelyn left no legitimate children, but a certain John Sidney claimed to be his son and consequently to be 8th earl of Leicester.

In 1744, the year after Jocelyn’s death, Thomas Coke, Baron Lovel (c. 1695–1759), was made earl of Leicester, but the title became extinct on his death in April 1759. The next family to hold the earldom was that of Townshend, George Townshend (1755–1811) being created earl of Leicester in 1784. In 1807 George succeeded his father as 2nd marquess Townshend, and when his son George Ferrars Townshend, the 3rd marquess (1778–1855), died in December 1855 the earldom again became extinct. Before this date, however, another earldom of Leicester was in existence. This was created in 1837 in favour of Thomas William Coke, who had inherited the estates of his relative Thomas Coke, earl of Leicester. To distinguish his earldom from that held by the Townshends Coke was ennobled as earl of Leicester of Holkham; his son Thomas William Coke (1822–1909) became 2nd earl of Leicester in 1842, and the latter’s son Thomas William (b. 1848) became 3rd earl.

See G. E. C(okayne), Complete Peerage, vol. v. (1893).

LEICESTER, ROBERT DUDLEY, (c. 1531–1588). This favourite of Queen Elizabeth came of an ambitious family. They were not, indeed, such mere upstarts as their enemies loved to represent them; for Leicester’s grandfather—the notorious Edmund Dudley who was one of the chief instruments of Henry VII.’s extortions—was descended from a younger branch of the barons of Dudley. But the love of power was a passion which seems to have increased in them with each succeeding generation, and though the grandfather was beheaded by Henry VIII. for his too devoted services in the preceding reign, the father grew powerful enough in the days of Edward VI. to trouble the succession to the crown. This was that John Dudley, duke of Northumberland, who contrived the marriage of Lady Jane Grey with his own son Guildford Dudley, and involved both her and her husband in a common ruin with himself. Robert Dudley, the subject of this article, was an elder brother of Guildford, and shared at that time in the misfortunes of the whole family. Having taken up arms with them against Queen Mary, he was sent to the Tower, and was sentenced to death; but the queen not only pardoned and restored him to