Famous artist painting

Famous artist painting
"Have they set the concierges at liberty, then?" I asked.
"Yes," he replied, "I had them liberated, I needed people I could trust. The woman is thoroughly devoted to me, and her husband would lay down his life for me."
"Oho!" I said, "when will he have occasion to do it?"
"This evening, - for this evening I expect the murderer."
"You expect the murderer this evening? Then you know him?"
Famous artist painting
"I shall know him; but I should be mad to affirm, categorically, at this moment that I do know him. The mathematical idea I have of the murderer gives results so frightful, so monstrous, that I hope it is still possible that I am mistaken. I hope so, with all my heart!"
"Five minutes ago, you did not know the murderer; how can you say that you expect him this evening?"
"Because I know that he must come."
Famous artist painting