Pencil Facts

A single pencil can draw a line 35 miles long, or write around 45,000 words. John Steinbeck loved the pencil and started every day with 24 freshly sharpened ones; it's said that he went through 300 pencils in writing East of Eden (1952), and used 60 a day on The Grapes of Wrath (1939) and Cannery Row (1945).
Our common pencils are hexagonal to keep them from rolling off the table, and they're yellow because the best graphite came from China, and yellow is traditionally associated with Chinese royalty.
-Writer's Almanac