If any person had told the Parliament which met in terror and perplexity after the crash of 1720 that in 1830 the wealth of England would surpass all their wildest dreams, that the annual revenue would equal the principal of that debt which they considered an intolerable burden, that for one man of £10,000 then living there would be five men of £50,000, that London would be twice as large and twice as populous, and that nevertheless the rate of mortality would have diminished to one half of what it then was, that the post-office would bring more into the exchequer than the excise and customs had brought in together under Charles II, that stage coaches would run from London to York in 24 hours, that men would be in the habit of sailing without wind, and would be beginning to ride without horses, our ancestors would have given as much credit to the prediction as they gave to Gulliver's Travels.