Greg Lamarche is crazy about the letters of the alphabet. It's a fascination that dates back to his years as a graffiti artist in Boston in the early '80s, when he was known for his tags' super-clean outlines, as well as for Skills, his popular Xeroxed zine of graffiti culture. Since then, he's branched out into collage and commercial design, but all of his work reveals an ongoing obsession with fonts and typography. Lamarche's current show at White Walls features eye-popping patterns of text cut from found paper that sing with raw energy.