_Sforza deprived of the Marca d’Ancona—Death of Eugenius IV.—Tommaso da
Sarzana is elected to the pontificate, and assumes the name of Nicolas
V.—State of Italy on the accession of Nicolas V.—Exemplary conduct of
that pontiff—Poggio’s inaugural address to Nicolas V.—His dialogues on
the Vicissitudes of Fortune, and on Hypocrisy—His invective against
the Antipope Felix—His translation of Xenophon’s Cyropædia, and of
Diodorus Siculus—His quarrels with George of Trebisond, and Tommaso da
Rieti—Celebration of the Jubilee—Publication of Poggio’s Facetiæ—Renewal
of hostilities between Poggio and Filelfo—Their reconciliation—Poggio’s
Historia disceptativa convivialis—His letter on the study of Law._