He might have taken some measures for making his character, and his past celebrity and fame as a physician known; but he did not dare to do this, for fear that Darius might learn to value his medical skill, and so detain him as a slave for the sake of his services. He thought that the chance was greater that some turn of fortune, or some accidental change in the arrangements of government might take place, by which he might be set at liberty, as an insignificant and worthless captive, whom there was no particular motive for detaining, than if he were transferred to the king's household as a slave, and his value as an artisan--for medical practice was, in those days, simply an art--were once known. He made no effort, therefore, to bring his true character to light, but pined silently in his dungeon, in rags and wretchedness, and in a mental despondency which was gradually sinking into despair. About this time, it happened that Darius was one day riding furiously in a chase, and coming upon some sudden danger, he attempted to leap from his horse. He fell and sprained his ankle. He was taken up by the attendants, and carried home. His physicians were immediately called to attend to the case. They were Egyptians. Egypt was, in fact, considered the great seat and centre of learning and of the arts in those days, and no royal household was complete without Egyptian physicians. The learning and skill, however, of the Egyptians in Darius's court were entirely baffled by the sprain. They thought that the joint was dislocated, and they turned and twisted the foot with so much violence, in their attempts to restore the bones to their proper position, as greatly to increase the pain and the inflammation. Darius spent a week in extreme and excruciating suffering. He could not sleep day nor night, but tossed in continual restlessness and anguish on his couch, made constantly worse instead of better by every effort of his physicians to relieve him. At length somebody informed him that there was a Greek physician among the captives that came from Sardis, and recommended that Darius should send for him. The king, in his impatience and pain, was ready for any experiment which promised the least hope of relief, and he ordered that Democedes should be immediately summoned. The officers accordingly went to the prison and brought out the astonished captive, without any notice or preparation, and conducted him, just as he was, ragged and wretched, and shackled with iron fetters upon his feet, into the presence of the king. The fetters which such captives wore were intended to allow them to walk, slowly and with difficulty, while they impeded the movements of the feet so as effectually to prevent any long or rapid flight, or any escape at all from free pursuers.