In this part of his subject he has, as we all know, many precursors and fellow-workers. The remarkable series, entitled "Historic Towns," instituted by Prof. Freeman, is known to most. The study of towns was the life and soul of Mr. Green's historic labours. Eloquent and powerful pictures of the great cities of the world fill the greater part of Mr. Harrison's well-known volume, "The Meaning of History"; and the student of universal history (a few of these, it may be hoped, are still left) finds them very stimulating and helpful. The special note of Prof. Geddes' method is that he does not limit himself to the greater cities, but also, and perhaps by preference, deals with the smaller, and with their physical environment; and, above all, that he attempts not merely to observe closely and thoroughly, but to generalise as the result of his observation. In biology, the study of any single organism, however minute and accurate, could reveal no laws (i.e., no general facts) of structure or function. As for instance, many forms of heart must be examined before the laws governing blood-circulation could be revealed; so here. Countless, indeed, are the forms of cities; even limiting our field of observation to those that have grown up in the last century they are numerous enough. Their differences and analogies would doubtless repay analysis, always supposing that we are clear how far the modern town, as contrasted with the mediaeval or Graeco-Roman city, can usefully be treated as "an integrate." This raises large questions of nation, of groups of nations, finally of Humanity, which cannot here be touched.