Plutarch, The Life of Cato the Younger 23

After such a change as this had been wrought and all the senators had hastened to adopt the milder and more humane penalty, Cato rose to give his opinion, and launched at once into a passionate and angry speech, abusing Silanus for his change of opinion, and assailing Caesar. 

Caesar, he said, under a popular pretext and with humane words, was trying to subvert the state; he was seeking to frighten the senate in a case where he himself had much to fear; and he might be well content if he should come off guiltless of what had been done and free from suspicion, since he was so openly and recklessly trying to rescue the common enemies, while for his country, which had been on the brink of ruin, and was so good and great, he confessed that he had no pity; and yet for men who ought not to have lived or been born even, he was shedding tears and lamenting, although by their deaths they would free the state from great slaughter and perils. 

This is the only speech of Cato which has been preserved, we are told, and its preservation was due to Cicero the consul, who had previously given to those clerks who excelled in rapid writing instruction in the use of signs, which, in small and short figures, comprised the force of many letters; these clerks he had then distributed in various parts of the senate house. 

For up to that time the Romans did not employ or even possess what are called shorthand writers, but then for the first time, we are told, the first steps toward the practice were taken. 

Be that as it may, Cato carried the day and changed the opinions of the senators, so that they condemned the men to death.