One of the greatest of Reformers in the annals of history was John Hus (the "goose" of Bohemia, as he was derisively called). His pious life and witness during his trial and martyrdom convinced many of the priests and church leaders of his innocence and the justice of his cause. Poggius was the papal legate who delivered the summons to John Hus to appear at the council of Constance, then participated in the council as a voting member. Hus was given a safe conduct by the emperor Sigismund which he cowardly broke in deference to the pressure from Hus' inveterate enemies. This 72 page book consists of two letters from Poggius to his friend Nikolai, and describes in living detail the trial and burning of Hus. So potent was John Hus' humble testimony contrasted with the amazing rudeness and injustice of the priests and cardinals, that even some of his ardent foes became his defenders. Even Poggius himself is profoundly affected.