The Pope had left Rome with many anxieties on his mind, fully appreciating the dangers of the journey before him, and not knowing if he might ever see the beloved city again. While he was on the way the news reached him that Henry, whom he had refused to receive in Rome, was on his way across the Alps, and as probably the details of that painful journey were unknown, and the first idea would be that the king was coming with an army in full force--still greater anxieties, if not alarms, must have been awakened among the Pope's supporters. It was still more alarming to find that the German escort which was to have met him at Mantua had not been sent, the hearts of the princes having failed them, and their plans having fallen into confusion at the news of the king's escape. Henry had been received with enthusiasm in Lombardy, always rebellious, and might make his appearance any day to overpower the chivalry of Tuscany, and put the lives of both Pope and Princess in danger. They were on the road to Mantua when this news reached them, and in the anxious council of war immediately held, it was resolved that the strong castle of Canossa, supposed to be impregnable, should be, for the moment at least, the Pope's shelter and resting-place. One of the great strongholds of Italy, built like so many on a formidable point of rock, of itself almost inaccessible, and surrounded by three lines of fortified walls, among which no doubt clustered the rude little dwellings of a host of retainers--the situation of this formidable place was one which promised complete protection: and the name of the Tuscan castle has since become one of the best-known names in history, as the incident which followed contains some of the most picturesque and remarkable scenes on record. The castle had already a romantic story; it had sheltered many a fugitive; forlorn princesses had taken refuge within its walls from the pursuit of suitors or of enemies, the one as dangerous as the other. Painfully carried up in his litter by those steep and dangerous ways, from one narrow platform of the cliff to another, with the great stretch of the landscape ever widening as he gained a higher point, and the vast vault of heaven rounding to a vaster horizon, the Pope gained this eyrie of safety, this eagle's nest among the clouds.