The massive grandeur of some of the Egyptian monuments is only to be explained by this levy _en masse_ of every available pair of hands. The kings of the ancient empire, at least, were unable to dispose of those prisoners of war captured in myriads, in whole races, by the Assyrian kings, and apparently employed by them in the construction of Nineveh. Now, it is impossible that such works as the Pyramids could have been begun and finished in the course of a single reign by free and remunerated labour, even if it had the help of numerous slaves. Certain arrangements in their design and the marvellously exact execution of the more important details of the masonry, prove that architects of great ability and skilful workmen were, indeed, employed upon those gigantic works; but the great bulk of the task must have required the collective effort of a whole population; of a population devoting themselves night and day to complete the work when once begun, like ants over their subterranean city or bees over their comb. [Illustration: FIG. 16.--Construction of a Temple at Thebes. (From Prisse.)] Even supposing that history had been silent upon this subject, the architect could easily divine, from these monuments themselves, how they had been constructed. Cast your eyes upon the ruins of the Athenian Acropolis; their dimensions will seem to you small in the extreme if you compare them with the buildings of Egypt and Assyria; on the other hand their workmanship is equally careful throughout; it is as exact and perfect in the concealed parts of the structure as in those which were to be visible, in the structural details as in the ornamental painting and sculpture. By these signs you may recognize at once, that, from its foundation to its completion, the whole work was in the hands of artisans whom long practice had made perfect in their trade, and that each single individual among them had made it a point of honour to acquit himself worthily of the task entrusted to him. In the gangs of docile labourers who succeeded each other in the workshops of Memphis or Thebes, there was, of course, a certain sprinkling of men who had become qualified by experience for the special work upon which they were employed; but the great majority were men suddenly taken from very different occupations, from the oar, the plough, the management of cattle; who therefore could have nothing but their unskilled labour to bestow. To such men as these a great part of the work had perforce to be confided, in order that it might be complete at the required time. In spite of the strictest supervision, the almost religious care in the placing and fixing of masonry, which might be fairly expected from the practised members of a trade guild, could not be ensured. Hence the singular inequalities and inconsistences which have been noticed in most of the great Egyptian buildings; sometimes it is the foundations which are in