e Good, duke of Burgundy, gave him a
canonry at Beauvais, sent him to the council of Constance, procured him
the post of _maitre des requetes_ in 1418, and finally in 1420 had him
made bishop of Beauvais. But the people were hostile to him, and he was
driven from his bishopric in 1429; whereupon he attached himself to the
English court, and in 1431 endeavoured to procure the surrender of Reims
to the English, so that Henry VI. might be crowned there. In this he
failed, and Henry was crowned in Paris on the 17th of December 1431 by
Henry Beaufort, cardinal bishop of Winchester, assisted by the bishops
of Beauvais and Noyon. On the 24th of May 1430, Joan of Arc having been
taken prisoner at Compiegne, within the limits of his diocese, Cauchon
acted as her accuser, and demanded the right of judging her. Joan was
taken to Rouen, whither Cauchon followed her, having been driven from
Beauvais. He conducted the trial with marked partiality and malevolence,
condemned the maid to imprisonment for life, and then, under pressure
from the populace and the English, had recourse to fresh perfidies,
declared Joan a relapsed heretic, excommunicated her, and handed her
over to the secular arm on the 30th of May 1431. As, in consequence of
this, it was impossible for him to return to his own diocese, he
obtained the bishopric of Lisieux in 1432 by favour of the king of
England. He assisted at the council of Basel in 1435, and died suddenly
on the 18th of December 1442. Excommunicated posthumously by Pope
Calixtus IV., his body was exhumed and thrown in the common sewer.

See Cerf, "Pierre Cauchon de Sommievre, chanoine de Reims et de
Beauvais, eveque de Beauvais et de Lisieux, son origine, ses dignites,
sa mort et sa sepulture," in the _Transactions_ of the Academy of
Reims (1896-1898).

CAUCHY, AUGUSTIN LOUIS, BARON (1789-1857), French mathematician, was
born at Paris on the 21st of August 1789, and died at Sceaux (Seine) on
the 23rd of May 1857. Having received his early education from his
father Louis Francois Cauchy (1760-1848), who held several minor public
appointments and counted Lagrange and Laplace among his friends, Cauchy
entered Ecole Centrale du Pantheon in 1802, and proceeded to the Ecole
Polytechnique in 1805, and to the Ecole des Ponts et Chaussees in 1807.
Having adopted the profession of an engineer, he left Paris for
Cherbourg in 1810, but returned in 1813 on account of his health,
whereupon Lagrange and