He had now come to a narrow passageway leading to the last of the inner posterns which pierced the walls. Here he found a sentinel on guard and the soldier sprang up to confront him. But a soldier to overcome was not an obstacle to stop the desperate flight of the baron. He struck the man heavily in the face with his sword, stunning him and sending him rolling in the dust. Once through the postern there now remained only a single palisade or stockade--a great fence constructed of iron bars and iron trellis-work, which constituted the outermost barrier between the fleeing prisoner and liberty. Once over that iron palisade he had only to dash into the woods and disappear. But it was ordained that Trenck was not to overcome this last obstacle, simple as it appeared. At a fatal moment, his foot was caught between two bars of the palisade and he was unable to free himself. While he was engaged in superhuman but futile efforts to release his foot, the sentinel of the passage, who had picked himself up, ran through the postern toward the palisade, followed by another soldier from the garrison. Together they fell upon Trenck, overwhelming him with blows with the butts of their muskets and secured him. Bruised and bleeding he was borne back to his cell. Major Doo informed Trenck, after this abortive attempt to escape, that he had been condemned to one year's imprisonment only. That year was within three weeks of expiring when the infamous major, who was an Italian, goaded the unfortunate young man into open defiance of his sovereign's mandate. His pardon was at once annulled and his confinement now became most rigorous. Another plot, headed by three officers and several soldiers of the guard, who were friendly to Trenck, was discovered at the last moment--in time for the conspirators themselves to escape to Bohemia, but under circumstances which prevented Baron de Trenck from accompanying them. This also served to increase the hardships of the prisoner's lot, and he now found himself deprived of the former companionship of his friends and surrounded by strangers, the one familiar face remaining being that of Lieutenant Bach, a Danish officer, a braggart swordsman and ruffler, who had always been hostile to him. But, despite his isolation, the energy and strength of Trenck's character were only augmented by his misfortunes, and he never ceased to plot for his deliverance. Weeks passed without any fruitful event occurring in the life of the prisoner, yet help was to come to him from a source from which he could never have expected it. But before that fortuitous result was destined to take place--in fact, as preliminary to its achievement--he was destined to be an actor in the most remarkable scene that ever has been recorded in the annals of prison life, and in one of the strangest duels of modern times.