But during the last years Chekhov began to treat himself with ever increasing strictness and exactitude: he kept his stories for several years, continually correcting and copying them, and nevertheless in spite of such minute work, the final proofs, which came from him, were speckled throughout with signs, corrections, and insertions. In order to finish a work he had to write without tearing himself away. "If I leave a story for a long time,"--he once said--"I cannot make myself finish it afterwards. I have to begin again." Where did he draw his images from? Where did he find his observations and his similes? Where did he forge his superb language, unique in Russian literature? He confided in nobody, never revealed his creative methods. Many note-books are said to have been left by him; perhaps in them will in time be found the keys to those mysteries. Or perhaps they will forever remain unsolved. Who knows? At any rate we must limit ourselves to vague hints and guesses. I think that always, from morning to night, and perhaps at night even, in his sleep and sleeplessness, there was going on in him an invisible but persistent--at times even unconscious--activity, the activity of weighing, defining and remembering. He knew how to listen and ask questions, as no one else did; but often, in the middle of a lively conversation, it would be noticed, how his attentive and kindly look became motionless and deep, as if it were withdrawing somewhere inside, contemplating something mysterious and important, which was going on there. At those moments A. P. would put his strange questions, amazing through their unexpectedness, completely out of touch with the conversation, questions which confused many people. The conversation was about neo-marxists, and he would suddenly ask: "Have you ever been to a stud-farm? You ought to see one. It is interesting." Or he would repeat a question for the second time, which had already been answered. Chekhov was not remarkable for a memory of external things. I speak of that power of minute memory, which women so often possess in a very high degree, also peasants, which consists in remembering, how a person was dressed, whether he has a beard and mustaches, what his watch chain was like or his boots, what color his hair was. These details were simply unimportant and uninteresting to him. But, instead, he took the whole person and defined quickly and truly, exactly like an experienced chemist, his specific gravity, his quality and order, and he knew already how to describe his essential qualities in a couple of strokes.