His writings in the papers exhibited civil valor, love for democracy, and power as a political adversary of the Pesqueira administration.

While General Secretary of the Government of Sonora, Corral was involved with the capture of the indigenous Yaqui military leader José Maria Leiva, known as Cajemé.

In La Constitución (Periódico oficial del gobierno del estado libre y soberano de Sonora), beginning with the issue of April 22, 1887, and ending July 8, 1887, Corral published biographical notes about Cajemé, which were recorded only a few days earlier during personal talks with the captured Yaqui.

[9] Corral's letter of resignation gave no doubt that he had foreknowledge of Díaz's intention to resign, and that the course of events would lead to a new government for Mexico: On the two occasions that the national convention advanced my candidacy as Vice-President of the republic, to figure in the elections with Gen. Diaz as President, I stated that I was prepared to occupy any office in which compatriots considered that I would be of use, and that if the public vote conferred upon me a position so far above my merits, then my intention would be to second in all respects Gen. Diaz's policy, in order to co-operate with him, as far as it lay in my power, toward the aggrandizement of the nation, which had developed so notably under his administration.

For my part, I can say that I have never endeavored to bring about the least obstacle either in the President's policy or his manner of carrying it out even at the cost of sacrificing my convictions, both because this was the basis of my programme and because this corresponded to my position and my loyalty, as well as that I did not seek any prestige in the office of Vice-President, so useful in the United States and so discredited in Latin countries.

Following my program of seconding Gen. Diaz's policy, I join my resignation with his and in the present note I retire from the office of Vice-President of the republic, begging the chamber to accept the same at the same time as that of the President.