To this not unpleasant picture of the conditions of Italian agricultural slavery a few words must be added about the great pastoral farms of Southern Italy. If a man invested his capital in a comparatively small estate of olives and vineyards, such as that which Cato treats of, and which seems to have been his own; or even in a latifundium of the kind which Varro more vaguely pictures, containing also parks and game and a moderate amount of pasture, he would need slaves mainly of a certain degree of skill. But on the largest areas of pasture, chiefly in the hill districts of Southern Italy, where there was little cultivation except what was necessary for the consumption of the slaves themselves, these were the roughest and wildest type of bondsmen. The work was that of the American ranche, the life harsh, and the workmen dangerous. It was in these districts and from these men that Spartacus drew the material with which he made his last stand against Roman armies in 72-71 B.C.; and it was in this direction that Caelius and Milo turned in 48 B.C. in quest of revolutionary and warlike bands. These roughs could even be used as galley-slaves; more than once in the Commentaries on the Civil War Caesar tells us that his opponents drafted them into the vessels which were sent to relieve the siege of Massilia[347]. It was here too, in the neighbourhood of Thurii, that a bloody fight took place between the slaves of two adjoining estates, strong men of courage, as Cicero describes them, of which we learn from the fragments of his lost speech _pro Tullio_. They were of course armed, and as we may guess from Varro's remarks on the kind of slaves suitable for shepherding,[348] this was usually the practice, in order to defend the flocks from wild beasts and robbers, particularly when they were driven up to summer pasture (as they still are) in the saltus of the Apennines. The needs of these shepherds would be small, and the latifundia of this kind were probably almost self-sufficing, no free labour being required. After their day's work the slaves were fed and locked up for the night, and kept in fetters if necessary;[349] they were in fact simply living tools, to use the expression of Aristotle, and the economy of such estates was as simple as that of a workshop. The exclusion of free labour is here complete: on the agricultural estates it was approaching a completion which it fortunately never reached. Had it reached that completion, the economic influence of slavery would have been altogether bad; as it was, the introduction of slave-labour on a large scale did valuable service to Italian agriculture in the last century B.C. by contributing the material for its revival at a time when the necessary free labour could not have been found. However lamentable its results may have been in other ways, especially on the great pastures, the economic history of Italy, when it comes to be written, will have to give it credit for an appreciable amount of benefit.