“No doubt,” said Holmes, “he was as you say. I have heard that he was atrocious. But how are you affected?”

“I will tell you it all. This villain’s policy was to murder, on one pretext or another, every man who showed such promise that he might in time come to be a dangerous rival. My husband - yes, my real name is Signora Victor Durando - was the San Pedro minister in London. He met me and married me there. A nobler man never lived upon earth. Unhappily, Murillo heard of his excellence, recalled him on some pretext, and had him shot. With a premonition of his fate he had refused to take me with him. His estates were confiscated, and I was left with a pittance and a broken heart.

“Then came the downfall of the tyrant. He escaped as you have just described. But the many whose lives he had ruined, whose nearest and dearest had suffered torture and death at his hands, would not let the matter rest. They banded themselves into a society which should never be dissolved until the work was done. It was my part after we had discovered in the transformed Henderson the fallen despot, to attach myself to his household and keep the others in touch with his movements. This I was able to do by securing the position of governess in his family. He little knew that the woman who faced him at every meal was the woman whose husband he had hurried at an hour’s notice into eternity. I smiled on him, did my duty to his children, and bided my time. An attempt was made in Paris and failed. We zig-zagged swiftly here and there over Europe to throw off the pursuers and finally returned to this house, which he had taken upon his first arrival in England.

“But here also the ministers of justice were waiting. Knowing that he would return there, Garcia, who is the son of the former highest dignitary in San Pedro, was waiting with two trusty companions of humble station, all three fired with the same reasons for revenge. He could do little during the day, for Murillo took every precaution and never went out save with his satellite Lucas, or Lopez as he was known in the days of his greatness. At night, however, he slept alone, and the avenger might find him. On a certain evening, which had been prearranged, I sent my friend final instructions, for the man was forever on the alert and continually changed his room. I was to see that the doors were open and the signal of a green or white light in a window which faced the drive was to give notice if all was safe or if the attempt had better be postponed.