No wonder that he, when for the pitiful sum of one hundred dollars he had signed for Thompson a receipt in full on account of Dr. Blackburn, vowed to have revenge. How true it is that there must be honor even amongst the worst of villains, in order that they may hang together. They broke faith with Hyams, and Hyams revealed circumstantially, and fully, their great crime against humanity. We have now seen these men planning to poison the water supply of New York City to the extent of fatality to its whole population, men, women, and children,--helpless age, and more helpless infancy doomed to death by the scope of their plan; and now, we have found them engaged in an effort to spread pestilence with the same purpose of the indiscriminate destruction of human life. What worse can they do? Can we after this be surprised at anything they may undertake? It will not avail to say that a man who could be hired to do such a thing as this is unworthy of credence, even under oath, and so that his testimony is not to be received. Hyams' story bears on its face the marks of a truthful narrative of the facts, just as they occurred, and it does not follow that because a man is a confessed scoundrel he is incapable of telling the truth. No adequate motive for falsehood in this case can be assigned. Had his employers kept faith with him, he would no doubt have kept their terrible secret, and it would have been buried with him. That they did not, only becomes a reason for his disclosure of the facts, not for his fabrication of falsehoods. But then his statement as to how he disposed of the goods in Washington City is fully confirmed by the testimony of Wall & Company, who produced an account of the transaction agreeing exactly, in date and amount, with that given by Hyams, and also in regard to his _alias_ of J. W. Harris. It was also corroborated by the National Hotel register of that date. Conover testified to this as one of the schemes planned by Thompson and his gang, and Hyams gives a full account of the manner of its execution. For some reason the infection was a failure in Washington City; but not so with the goods sent by Myers, the sutler, to New Berne, N.C. It will be recollected that an epidemic of yellow fever broke out there in the latter part of the summer of 1864, that swept away large numbers of people, both citizens and soldiers. No doubt this epidemic was due to the infection carried in the clothing that Myers received from Hyams, to be sold on commission; and that in the great day of final account these men will find themselves arraigned as the murderers of all those who fell as the victims of their hellish plot, before a tribunal that is infinitely perfect in its knowledge and just in its decisions. _Plot to Burn New York City and its Attempted Execution._