Baltimore artist, critic, teacher and art historian Bennard Perlman knew Andy Warhol when.

From 1945 to 1949, they were classmates at Pittsburgh's Carnegie Tech (now Carnegie Mellon University). Perlman has written an essay in the Andy Warhol Museum's inaugural book, "The Education of Andy Warhol."

Perlman recalls that after initial difficulties in school, Warhol became recognized as outstanding. "He just thought differently," says.

Perlman remembers Warhol as "the least demonstrative person in our whole class. . . . In a group he was a great listener but didn't really contribute much in terms of agreeing or disagreeing. I think he absorbed an awful lot."

Perlman remembers Warhol warmly. "I liked him and his soft-spoken manner. He never in my presence used profanity, and he never would say anything behind somebody's back, against a teacher or even a student. He was a very nice person. . . . [And] I can tell you one thing: I would never call him lackadaisical or lazy. People called him that, but it was not my impression of him."