"Marcus is the innovator of Modern Expressionism. What initiated it for him, was the graffiti on the sides of subway trains when he traveled from the Bronx to Manhattan to sell his work on the street. This is somewhat reminiscent of Jackson Pollock learning to kneel with the Hopi Indians and throw sand to make sand pictures. That innovation may have been the beginning of Abstract Expressionism."
- Jerome A. Donson, Former Director of "The American Vanguard Exhibitions in Europe," (Action Paintings), 1961, MOMA, Museum of Modern Art, NY)