With pencil on fiber paper, Mr. Arroyo has reinterpreted in 21, full-size panels the "Adoration of the Mystic Lamb, " the 15th-century oil painting by the Van Eyck brothers.

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In the past, General Growth took surveys the old fashioned way by filling in dots on pencil and paper.

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This was then placed in a pencil and used to scribble on paper imprinted with broken gold stripes.

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Both exhibitions have a lot to teach us about an array of materials used on paper, from pencil and charcoal to pastel and watercolor, while the examples from the Clark are also instructive about diverse print techniques, from woodcut to lithography a hot new medium for late 19th-century artists.

WSJ: Fine Lines | Frick Collection | Brooklyn Museum | by Karen Wilkin

For that, I had to create and add a digital note in the book (using the iPad's on-screen keyboard) or do the unthinkable use a pencil and paper.

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On Tuesday, floor traders wound up the day processing orders manually, using paper, pencil and in some cases white board to keep track of buy and sell orders, instead of using the electronic trading system that is supposed to be the show-piece of the hybrid model.

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