d. 1559) in his _Memoires_
(1569). The celebrated _Instructions_, reprinted as _Traite de la
discipline militaire_ in 1554 and 1592, was formerly attributed to him,
but it has been proved that he could not have written it (see Bayle,
_Dict. Hist._ i. 502, and Jahns, _Geschichte der Kriegswissenschaften_,
i. 498 seq.); this work, however, is of the highest value for the study
of the military art of the 16th century; in 1550 an Italian, in 1567 a
Spanish, and in 1594 and 1619 German translations were published.

See also the edition of Martin du Bellay's _Memoires_ by Michaud and
Poujoulat (1838), and Bourrilly's _Fragments de la premiere Ogdoade_
(Paris, 1905). There is an excellent study of Guillaume du Bellay by
V. L. Bourrilly (Paris, 1905). (J. I.)

DU BELLAY, JEAN (c. 1493-1560), French cardinal and diplomat, younger
brother of Guillaume du Bellay, appears as bishop of Bayonne in 1526,
member of the privy council in 1530, and bishop of Paris in 1532. Supple
and clever, he was well fitted for a diplomatic career, and carried out
several missions in England (1527-1534) and Rome (1534-1536). In 1535 he
received his cardinal's hat; in 1536-1537 he was nominated
"lieutenant-general" to the king at Paris and in the Ile de France, and
was entrusted with the organization of the defence against the
imperialists. When Guillaume du Bellay went to Piedmont, Jean was put in
charge of the negotiations with the German Protestants, principally
through the humanist Johann Sturm and the historian Johann Sleidan. In
the last years of the reign of Francis I., cardinal du Bellay was in
favour with the duchesse d'Etampes, and received a number of
benefices--the bishopric of Limoges (1541), archbishopric of Bordeaux
(1544), bishopric of Le Mans (1546); but his influence in the council
was supplanted by that of Cardinal de Tournon. Under Henry II., being
involved in the disgrace of all the servants of Francis I., he was sent
to Rome (1547), and he obtained eight votes in the conclave which
followed the death of Pope Paul III. After three quiet years passed in
retirement in France (1550-1553), he was charged with a new mission to
Pope Julius III. and took with him to Rome his young cousin the poet
Joachim du Bellay (q.v.). He lived in Rome thenceforth in great state.
In 1555 he was nominated bishop of Ostia and dean of the Sacred College,
an appointment which was disapproved of by Henry II. and brought him
into fresh disg