Now that the bloodhounds have been employed to track the Whitechapel murderer, it is to be hoped that if he again attempts to indulge his sanguinary instincts he will be speedily brought to justice. At seven o'clock on Tuesday morning a trial of the animals took place before Sir Charles Warren. In all half-a-dozen runs were made, Sir Charles in two instances acting as the hunted man. In every instance the dogs hunted persons who were complete strangers to them, and occasionally the trail would be crossed. When this happened the hounds were temporarily checked, but either one or the other would pick up the trail again. In one of the longest courses the hounds were checked at half the distance. Burgho, the name of one of them, ran back, but Barnaby, the name of the other, making a fresh cast forward, recovered the trail and ran the quarry home. In consequence of the coldness of the scent on Tuesday morning, the hounds worked very slowly, but they demonstrated the possibility of tracking complete strangers on whose trail they had been laid.