On April 11, 1870, the governor of the province of Entre Ríos, Justo José de Urquiza, was assassinated in his palace. President Nicolás Avellaneda wrote a proclamation condemning the assassination. The proclamation was published in Volume XXI of Sarmiento's Works. The text of the proclamation is identical to the draft of the Minister of Justice and Public Instruction, Nicolás Avellaneda. However, the second part of the text is quite different. The initial invocation of the text of the Tucumán minister to his fellow citizens is identical to the text that Sarmiento would publish in the reconstruction and description of the atrocious crime. The Governor of Entre Ríos was killed by the assassins as the first shadows of the night fell, surrounded by his daughters, who tried to remove him from the knives, and without the presence of a single man being able to give that act the appearance of a fight. The Legislature meets afterwards, under the shock of this crime, and with those who had committed it present, it chooses, yielding to their intimidation, General López Jordán Governor of the Province, for the time that remained to that whom he had killed. The assassination was thus sanctioned by this act as a legitimate means of succession in power. However, the two versions of the more detailed second part of the text are quite different. In fact, not only the twenty years of life and the condition of President of the Republic separate the author of the draft from the proclamation, finally signed by the highest political authority of the country to condemn violence. But it was, clear, nothing more and nothing less, that of Domingo F. Sarmiento, someone who knew how to make words but, fundamentally and paraphrasing the great philosopher of language Austin, someone who knew how to make things with words. The second part of the text -no more extensive than the draft- is quite another. Radically quite another.