American abstract sculptor, born in Sonoma, California. He worked as a studio assistant to Tony Smith before studying at the Cooper Union, New York, where he graduated in fine art in 1965; in 1969 he began teaching there. His early work was in wood (for a time he earned his living as a cabinet-maker), but his favoured materials were glass and steel. Unlike many sculptors who used these materials, however, he aimed for poetic rather than industrial effects (the French poet Stéphane Mallarmé was one of his greatest inspirations). His forms were fairly minimalist, but he made subtle play with the qualities of glass—its reflectiveness, translucency, transparency, or opacity. Wilmarth committed suicide.