Famous artist painting

But the murderer had been even quicker than I had been. He had heard the grating of the ladder on the wall, and I saw the monstrous back of the man raise itself. I saw his head. Did I really see it? - The candle on the parquet lit up his legs only. Above the height of the table the chamber was in darkness. I saw a man with long hair, a full beard, wild-looking eyes, a pale face, framed in large whiskers, - as well as I could distinguish, and, as I think - red in colour. I did not know the face. That was, in brief, the chief sensation I received from that face in the dim half-light in which I saw it. I did not know it - or, at least, I did not recognise it.
"Now for quick action! It was indeed time for that, for as I was about to place my legs through the window, the man had seen me, had bounded to his feet, had sprung - as I foresaw he would - to the door of the ante-chamber, had time to open it, and fled. But I was already behind him, revolver in hand, shouting 'Help!'