After studying sculpture at Stanford University, California, Henry Chalfant moved to New York, where he encountered graffiti on the subways. He began documenting these rolling works photographically in 1976, using a multiple-frame panoramic technique that suited the long, narrow train cars perfectly. Chalfant became a graffiti insider, often getting a tip-off about the creation of a freshly painted car. Chalfant exhibited his images of painted trains by artists such as Lee, Blade, and Dondi in 1980 at New York’s OK Harris Gallery, where he met photojournalist Martha Cooper, known for her atmospheric photos of graffiti. Their book Subway Art was published in 1984. Chalfant joined with filmmaker Tony Silver to create Style Wars, a documentary about the graffiti movement. These two projects were overwhelmingly responsible for the spread of graffiti beyond New York City. Chalfant’s second book, Spraycan Art (1987), like its predecessor, sold hundreds of thousands of copies.