The committee consisting of Drs. Bailey, Macneven, and A. L. Anderson, to whom was referred the inquiry into the origin of the malignant cholera in the Alms-house and the different institutions connected with it, further report: the Penitentiary, situated about five hundred feet from the Alms-house, and containing three classes of criminals, have no communication with one another; but the Bridewell and Penitentiary prisoners have a common stairway to their apartments; and the yards of the Female State and Female Penitentiary prisoners are separated by a high open picket fence, near to which the Penitentiary prisoners pass to and from their work-house, and on the opposite side of the Female State prisoners yard, and at a little distance is situated the Cholera Hospital, first opened on the 5th or 6th of July. In this building were confined, on the 1st of July, fifty-four Female State, about one hundred and twenty Female Penitentiary, and about fifty Bridewell prisoners; and the first person who had malignant cholera in that prison was Ann Smith, taken up at the Five Points, and sent there July 2d--she sickened on the 5th, and died the next day, and on the 7th, four more Female Penitentiary prisoners had the disease. On the 8th of July, all the remaining prisoners of this class were sent to Blackwell’s Island, and put into a fresh white-washed building prepared for them. The removal of those persons to a healthy residence, and an unrestrained exercise in the open country air, appear to have checked the development of that disease among them, for not until the 10th did any of them sicken, when four of them were taken with that disease, and since then seven more. Dr. Spring, the physician stationed there, informed us that the disease had become milder since their removal to the Island, two only having died of thirteen patients, and the remaining eleven, visited by us, were doing well, except one. The first State prisoner had that disease on the 9th of July, and eight more on the 12th and 13th, four each day; and since that time five more, the greater part of whom have died. They are all in one very large apartment, having three tier of windows on one side only, but the three stories are one open space from the top to the bottom of the building. The first two cases occurred in the Bridewell class also on the 9th, the next on the 11th instant; since then, six more have had the disease.