Mr. FISHER, the surgeon, was sworn, and deposed as follows:--I am surgeon to the Police establishment in Bow-street. I was called upon for the first time, this day, to examine the body of the deceased. I found an external wound under the right breast. It was two inches in length, and half an inch broad. I opened the body to ascertain the depth and direction of the wound, and I discovered that some sharp instrument had penetrated between the fifth and sixth ribs, wounded the outward surface of the right lobe of the liver, passed through the diaphragm into the chest, lacerated the pericardium, penetrated the right ventricle of the heart, wounded the left lobe of the lungs, and struck against the ribs on the left side. The wound I supposed to be about twelve inches in length. The blood flowed from the heart, and occasioned immediate death. The opening in the pericardium was larger than that presented by the external wound, which was always the case with wounds of this description. The weapon was prevented from passing entirely through the body by the ribs on the left side. It must have been a very sharp instrument, both pointed and cutting, to make such a wound. The membranes, which were cut asunder, could only have been severed by an exceedingly sharp instrument. That death was inevitable after such a wound, the heart having been cut open, and the blood effused into the cavity of the chest. GEORGE THOMAS RUTHVEN being sworn, said, I am an officer belonging to the public-office in Bow-street. On Wednesday evening last, at half-past eight o’clock, I was in this house. I received an order from Mr. Birnie, who is a Justice of the Peace for the county of Middlesex, to go to a shed or stable in Cato-street, in consequence of a number of men being assembled there for treasonable purposes. There was a warrant issued by Mr. Baker, a magistrate of Marlborough-street. On entering the house, I observed in the lower place a man with a cutlass at his side, and a musket on his shoulder. The door by which I entered from the street was not fast; there were persons going in and out; the man with the musket seemed as if he was guarding the staircase; there was only one man on guard. Ellis, Smithers, the deceased, and several others, went in with me. I don’t know how they came in. They were of course ordered. They were all constables, in number about a dozen. I was the first person that entered. Mr. Birnie, the magistrate, was not there at that time; he was at hand in the street, giving orders. The man who stood at the door as sentinel was walking about. I did not stop to see what he did particularly, but immediately called out to some of the party who followed to secure him. I am not aware that they did secure him, for I immediately went up the stairs. I believe that man was taken; but I am not aware that he was apprehended then; I believe he was caught afterwards. I ascended by a sort of step-ladder staircase.