'When we are thinking of rebuilding a city, or of founding a fort or a general's quarters, we shall rely upon you to express our thoughts on paper [in an architect's design]. The builder of walls, the carver of marbles, the caster of brass, the vaulter of arches[472], the plasterer, the worker in mosaic, all come to you for orders, and you are expected to have a wise answer for each. But, then, if you direct them rightly, while theirs is the work yours is all the glory. [Footnote 472: 'Camerarum rotator.'] 'Above all things, dispense honestly what we give you for the workmen's wages; for the labourer who is at ease about his victuals works all the better. 'As a mark of your high dignity you bear a golden wand, and amidst the numerous throng of servants walk first before the royal footsteps [i.e. last in the procession and immediately before the King], that even by your nearness to our person it may be seen that you are the man to whom we have entrusted the care of our palaces.' 6. FORMULA OF THE COUNT OF THE AQUEDUCTS. [Sidenote: Comitiva Formarum Urbis.] 'Though all the buildings of Rome are wonderful, and one can scarce for this reason say which are the chief among them, we think a distinction may be drawn between those which are reared only for the sake of ornament and those which also serve a useful purpose. Thus, however often one sees the Forum of Trajan, it always seems a wonder[473]. To stand on the lofty Capitol is to see all other works of the human intellect surpassed. And yet neither of these great works touches human life, nor ministers to health or enjoyment. But in the Aqueducts of Rome we note both the marvel of their construction and the rare wholesomeness of their waters. When you look at those rivers, led as it were over piled up mountains, you would think that their solid stony beds were natural channels, through so many ages have they borne the rush of such mighty waters. And yet even mountains are frequently undermined, and let out the torrents which have excavated them; while these artificial channels, the work of the ancients, never perish, if reasonable care be taken of their preservation. [Footnote 473: 'Trajani Forum vel sub assiduitate videre miraculum est.'] 'Let us consider how much that wealth of waters adds to the adornment of the City of Rome. Where would be the beauty of our _Thermae_, if those softest waters were not supplied to them?