I was bound to follow into its dim and scarce perceptible variety of tone and shadow. Then I had to make the transition from a strong light to as dark a shade, preserving the masses, but gradually softening off the intermediate parts. It was so in nature; the difficulty was to make it so in the copy. I tried, and failed again and again; I strove harder, and succeeded as I thought. The wrinkles in Rembrandt were not hard lines, but broken and irregular. I saw the same appearance in nature, and strained every nerve to give it. If I could hit off this edgy appearance, and insert the reflected light in the furrows of old age in half a morning, I did not think I had lost a day. Beneath the shrivelled yellow parchment look of the skin, there was here and there a streak of the blood colour tinging the face; this I made a point of conveying, and did not cease to compare what I saw with what I did (with jealous, lynx-eyed watchfulness) till I succeeded to the best of my ability and judgment. How many revisions were there! How many attempts to catch an expression which I had seen the day before! How often did we try to get the old position, and wait for the return of the same light! There was a puckering up of the lips, a cautious intro-