Now on first thoughts one might conceive that it would have been more advantageous in every way to build the wall continuously, or at least continuously within the two main divisions. After all, the wall was intended, as was universally proclaimed and known, to be a protection against the peoples of the north. But how can a wall protect if it is not a continuous structure? Not only can such a wall not protect, but what there is of it is in perpetual danger. These blocks of wall left standing in deserted regions could be easily pulled down again and again by the nomads, especially as these tribes, rendered apprehensive by the building operations, kept changing their encampments with incredible rapidity, like locusts, and so perhaps had a better general view of the progress of the wall than we, the builders. Nevertheless the task of construction probably could not have been carried out in any other way. To understand this we must take into account the following: the wall was to be a protection for centuries; accordingly, the most scrupulous care in the building, the application of the architectural wisdom of all known ages and peoples, an unremitting sense of personal responsibility in the builders were indispensable prerequisites for the work. True, for the more purely manual tasks ignorant day laborers from the populace, men, women, and children who offered their services for good money, could be employed; but for the supervision even of every four day laborers an expert versed in the art of building was required, a man who was capable of entering into and feeling with all his heart what was involved. And the higher the task, the greater the responsibility. And such men were actually to be had, if not indeed so abundantly as the work of construction could have absorbed, yet in great numbers.
For the work had not been undertaken without thought. Fifty years before the first stone was laid, the art of architecture, and especially that of masonry, had been proclaimed as the most important branch of knowledge throughout the whole area of a China that was to be walled around, and all other arts gained recognition only insofar as they had reference to it. I can still remember quite well us standing as small children, scarcely sure on our feet, in our teacher's garden, and being ordered to build a sort of wall out of pebbles; and then the teacher, girding up his robe, ran full tilt against the wall, of course knocking it down, and scolded us so terribly for the shoddiness of our work that we ran weeping in all directions to our parents. A trivial incident, but significant of the spirit of the time.