It was on December 18 that the Emperor, ill and dejected, returned to France, leaving the remnant of his army behind him, to struggle with the horrors of the retreat. He knew too well that at the first sign of weakness and defeat the hatreds that his despotism had sown all over Europe would spring in scores from the earth, armed to the teeth, and for the first time in his career the thought entered like iron into his soul that the star in which he so firmly believed might be setting. Could anything be done, he wondered, in case, in case—it was as well to be prepared for everything. Yes, that was it! His son must be crowned Emperor by Pope Pius the Seventh, who was still a prisoner at Fontainebleau, and then, if abdication was forced upon himself, his dynasty would still sit on the throne of France. But though the Pope did not refuse when Napoleon arrived unexpectedly at Fontainebleau, and even allowed the day for the ceremony to be fixed, he made various difficulties, and in the end retracted altogether the consent which had been unwillingly wrung from him. While his father was thus mapping out his future career, the little prince was living happily at St. Cloud with Madame de Montesquiou. In April, just after he had passed his second birthday, a great event happened—he put on his first pair of trousers, and though they were only made of muslin, his nurses were as proud as if they had been a pair of jack boots! Nobody, they said, and it was quite true, would have taken him for less than three, or even four, but still it was strange that so quick and lively a child should be so slow in talking.