The heat of altercation between Poggio and Valla was inflamed by the interference of Niccolo Perotti, a pupil of the latter, who attacked Poggio with great virulence. Poggio was not tardy in replying to this new antagonist. If we may judge of the nature of his invective against Perotti, by a short extract from it, which occurs in Bandini’s catalogue of the manuscripts of the Laurentian library, it was not at all inferior in acrimony to his other compositions of a similar nature.[438] A friendly and sensible letter of admonition, which Francesco Filelfo addressed to the belligerent parties, exhorting them to consult for their own dignity, by ceasing to persecute each other with obloquy, is a memorable instance how much easier it is to give wholesome advice than to set a good example.[439] The foregoing traits of the history of literature prove, that we must receive with some grains of allowance the doctrine of the amiable Ovid, when he asserts that, —“Ingenuas didicisse fideliter artes Emollit mores nec sinit esse feros.” It is indeed a most lamentable truth, that few quarrels are more violent or implacable than those which are excited by the jealousy of literary rivalship, and that the bitterest vituperative language on record occurs in the controversial writings of distinguished scholars. Several causes concur in producing this unhappy effect. It is of the very essence of extraordinary talents to advance to extremes. In men whose ardent minds glow with the temperature of genius, whether the flame be kindled by the scintillation of love or of enmity, it burns with impetuous fury. The existence of many scholars, and the happiness of the great majority of the cultivators of literature, depend upon the estimation in which they are held by the public. Any assertion or insinuation, therefore, derogatory to their talents or acquirements, they consider as a dangerous infringement upon their dearest interests, which the strong principle of self-preservation urges them to resent. The objects upon which we employ a considerable portion of our time and labour acquire in our estimation an undue degree of importance. Hence it happens, that too many scholars, imagining that all valuable knowledge centers in some single subject of study to which they have exclusively devoted their attention, indulge the spirit of pride, and arrogantly claim from the public a degree of deference, which is by no means due to the most successful cultivator of any single department of science or of literature. And in the literary, as well as in the commercial world, undue demands are resentfully resisted; and amongst scholars, as amongst men of the world, pride produces discord. Learned men are also too frequently surrounded by officious friends, whose ignorant enthusiasm of attachment betrays them into a kind of idolatry, which is productive of the most mischievous consequences to its object. They who are accustomed to meet with a blind