[In the following excerpt, Mackail praises Cato as "the founder" of Roman prose, while also describing his influence as "somewhat narrow and harsh. " He briefly summarizes each of the major works.]

In the history of the half-century following the war with Hannibal, Cato is certainly the most striking single figure. It is only as a man of letters that he has to be noticed here; and the character of a man of letters was, perhaps, the last in which he would have wished to be remembered or praised. Yet the cynical and indomitable old man, with his rough humour, his narrow statesmanship, his obstinate ultra-conservatism, not only produced a large quantity of writings, but founded and transmitted to posterity a distinct and important body of critical dogma and literary tradition. The influence of Greece had, as we have already seen, begun to permeate the educated classes at Rome through and through. Against this Greek influence, alike in literature and in manners, Cato struggled all his life with the whole force of his powerful intellect and mordant wit; yet it is most characteristic of the man that in his old age he learned Greek himself, and read deeply in the masterpieces of that Greek literature from which he was too honest and too intelligent to be able to withhold his admiration. While much of contemporary literature was launching itself on the fatal course of imitation of Greek models, and was forcing the Latin language into the trammels of alien forms, Cato gave it a powerful impulse towards a purely native, if a somewhat narrow and harsh development. The national prose literature, of which he may fairly be called the founder, was kept up till the decay of Rome by a large and powerful minority of Latin writers. What results it might have produced, if allowed unchecked scope, can only be matter for conjecture; in the main current of Latin literature the Greek influence was, on the whole, triumphant; Cato's was the losing side (if one may so adapt the famous line of Lucan), and the men of genius took the other.

The speeches of Cato, of which upwards of a hundred and fifty were extant in Cicero's time, and which the virtuosi of the age of Hadrian preferred, or professed to prefer, to Cicero's own, are lost, with the exception of inconsiderable fragments. The fragments show high oratorical gifts; shrewdness, humour, terse vigour and controlled passion; "somewhat confused and harsh," says a late but competent Latin critic, "but strong and vivid as it is possible for oratory to be." We have suffered a heavier loss in his seven books of Origines, the work of his old age. This may broadly be called an historical work, but it was history treated in a style of great latitude, the meagre, disconnected method of the annalists alternating with digressions into all kinds of subjects—geography, ethnography, reminiscences of his own travels and experiences, and the politics and social life of his own and earlier times. It made no attempt to keep up either the dignity or the continuity of history. His absence of method made this work, however full of interest, the despair of later historians: what were they to think, they plaintively asked, of an author who dismissed whole campaigns without even giving the names of the generals, while he went into profuse detail over one of the war-elephants in the Carthaginian army?

The only work of Cato's which has been preserved in its integrity is that variously known under the titles De Re Rustica or De Agri Cultura. It is one of a number of treatises of a severely didactic nature, which he published on various subjects—agricultural, sanitary, military, and legal. This treatise was primarily written for a friend who owned and cultivated farms in Campania. It consists of a series of terse and pointed directions following one on another, with no attempt at style or literary artifice, but full of a hard sagacity, and with occasional flashes of dry humour, which suggest that Cato would have found a not wholly uncongenial spirit in President Lincoln….