"In such cases, moreover, it is well to remember that the criminal not merely sins against humanity in inexpiable and unpardonable fashion, but sins particularly against his own race, and does them a wrong far greater than any white man can possibly do them. Therefore, in such cases the colored people throughout the land should in every possible way show their belief that they, more than all others in the community, are horrified at the commission of such a crime and are peculiarly concerned in taking every possible measure to prevent its recurrence and to bring the criminal to immediate justice. The slightest lack of vigor either in denunciation of the crime or in bringing the criminal to justice is itself unpardonable."