, ten thousand eight hundred and thirty-six; Louis-Philippe, eighty-nine thousand and twenty; the Republic of 1848, twenty-three thousand three hundred and eighty-one; the present government, seventy thousand five hundred; in all, at the present time, two hundred and twenty-six thousand six hundred and ten metres; sixty leagues of sewers; the enormous entrails of Paris. An obscure ramification ever at work; a construction which is immense and ignored.