What a surprise! Half of the crazy graffiti painting duo, Smith and Sane, probably most known for painting the side of the Brooklyn Bridge, also doodled in his textbook. Old school graff writers, they’re just like us! They get bored with math too! One student at Hunter College High School received Sane’s math book from the 1985 school year and scanned some of the better pages. Mikeazorin writes:

I attend the school of the late great Sane, brother of Smith, together known as the legendary “Sane Smith”. Sane’s status is well-known in my school amongst graffiti writers and those interested in graffiti. Although his death is somewhat of a mystery, he is an undisputed king. Starting school this year, I received my textbooks. I opened my math textbook and saw a Sane tag. At first I thought it was just some kid copying Sane’s tag, but it was everywhere in the book. The name “David Smith” was logged in the list of names exactly in Sane’s handstyle. I knew now that I was holding an artifact of graffiti history. Sane’s very own math textbook, used in my school from years 1985 and 1986.

Check out the rest of the images for more Sane tags, a Futura tag, and drawings of ponies.