great end, and indispensable condition towards all foreign warfare, no one military engine in the whole armory of Rome availed so much as her Italian colonies. The other use of these colonies, as frontier garrisons, or, at any rate, as interposing between a foreign enemy and the gates of Rome, they continued to perform long after their earlier uses had passed away; and Cicero himself notices their value in this view. "Colonias," says he [_Orat. in Rullum_], "sic idoneis in locis contra suspicionem periculi collocarunt, ut esse non oppida Italiæ sed _propugnacula_ imperii viderentur." _Finally_, the colonies were the best means of promoting tillage, and the culture of vineyards. And though this service, as regarded the Italian colonies, was greatly defeated in succeeding times by the ruinous largesses of corn [_frumentationes_], and other vices of the Roman policy after the vast revolution effected by universal luxury, it is not the less true that, left to themselves and their natural tendency, the Roman colonies would have yielded this last benefit as certainly as any other. Large volumes exist, illustrated by the learning of Rigaltius, Salmatius, and Goesius, upon the mere technical arrangements of the Roman colonies. And whose libraries might be written on these same colonies considered as engines of exquisite state policy.] and by the habits of the people. This monarchy had been of too slow a growth--too gradual, and too much according to the regular stages of nature herself in its development, to have any chance of being other than well cemented; the cohesion of its parts was intense; seven centuries of growth demand one or two at least for palpable decay; and it is only for harlequin empires like that of Napoleon, run up with the rapidity of pantomime, to fall asunder under the instant reaction of a few false moves in politics, or a single unfortunate campaign. Hence it was, and from the prudence of Augustus acting through a very long reign, sustained at no very distant interval by the personal inspection and revisions of Hadrian, that for some time the Roman power seemed to be stationary. What else could be expected? The mere strength of the impetus derived from the republican institutions, could not but propagate itself, and cause even a motion in advance, for some time after those institutions had themselves given way. And besides the military institutions survived all others; and the army continued very much the same in its discipline and composition, long after Rome and all its civic institutions had bent before an utter revolution. It was very possible even that emperors should have arisen with martial propensities, and talents capable of masking, for many years, by specious but transitory conquests, the causes that were silently sapping the foundations of Roman supremacy; and thus by accidents of personal character and taste, an empire might even have expanded itself in appearance, which, by all its permanent and real