The character of Napoleon, however, was little known to himself, if he seriously thought that his restless and powerful mind could be satisfied with the investigation of abstract truths, or amused by the leisure of literary research. He compared his abdication to that of Charles V., forgetting that the Austrian Emperor's retreat was voluntary, that he had a turn towards mechanical pursuits, and that even with these means of solace, Charles became discontented with his retirement. The character of Buonaparte was, on the contrary, singularly opposed to a state of seclusion. His propensities continued to be exactly of the same description at Elba, which had so long terrified and disquieted Europe. To change the external face of what was around him; to imagine extensive alterations, without accurately considering the means by which they were to be accomplished; to work within his petty province such alterations as its limits permitted; to resume, in short, upon a small scale, those changes which he had attempted upon that which was most magnificent; to apply to Elba the system of policy which he had exercised so long in Europe, was the only mode in which he seems to have found amusement and exercise for the impatient energies of a temper, accustomed from his early youth to work upon others, but apt to become lethargic, sullen, and discontented, when it was compelled, for want of other exercise, to recoil upon itself. During the first two or three weeks of his residence in the island of Elba, Napoleon had already planned improvements, or alterations and innovations at least, which, had they been to be carried into execution with the means which he possessed, would have perhaps taken his lifetime to execute. It was no wonder, indeed, accustomed as he had been to speak the word, and to be obeyed, and to consider the improvements which he meditated as those which became the head of a great empire, that he should not have been able to recollect that his present operations respected a petty islet, where magnificence was to be limited, not only by utility, but by the want of funds. In the course of two or three days' travelling, with the same rapidity which characterised his movements in his frequent progresses through France, and showing the same impatience of rest or delay, Napoleon had visited every spot in his little island, mines, woods, salt-marshes, harbours, fortifications, and whatever was worthy of an instant's consideration, and had meditated improvements and innovations respecting every one of them. Till he had done this he was impatient of rest, and having done so, he lacked occupation.