Let us then, that we may learn how to bear our part in this great work of Social Reform, consider awhile great cities, their good and evil; and let us start from the facts about your own city of which I have just put you in remembrance. The universal law will be best understood from the particular instance; and best of all, from the instance with which you are most intimately acquainted. And do not, I entreat you, fear that I shall be rude enough to say anything which may give pain to you, my generous hosts; or presumptuous enough to impute blame to anyone for events which happened long ago, and of the exciting causes of which I know little or nothing. Bristol was then merely in the same state in which other cities of England were, and in which every city on the Continent is now; and the local exciting causes of that outbreak, the personal conduct of A or B in it, is just what we ought most carefully to forget, if we wish to look at the real root of the matter. If consumption, latent in the constitution, have broken out in active mischief, the wise physician will trouble his head little with the particular accident which woke up the sleeping disease. The disease was there, and if one thing had not awakened it some other would. And so, if the population of a great city have got into a socially diseased state, it matters little what shock may have caused it to explode. Politics may in one case, fanaticism in another, national hatred in a third, hunger in a fourth—perhaps even, as in Byzantium of old, no more important matter than the jealousy between the blue and the green charioteers in the theatre, may inflame a whole population to madness and civil war. Our business is not with the nature of the igniting spark, but of the powder which is ignited. I will not, then, to begin, go as far as some who say that “A great city is a great evil.” We cannot say that Bristol was in 1830 or is now, a great evil. It represents so much realised wealth; and that, again, so much employment for thousands. It represents so much commerce; so much knowledge of foreign lands; so much distribution of their products; so much science, employed about that distribution.