sentences:  In January 1959 Schueler returned to New York and exhibited at Leo Castelli Gallery and at the Stable Gallery in 1961 and 1963.During the 1960s he was an instructor at Yale University's Norfolk Summer School (1960, 1961), a visiting artist at both Yale University School of Art (1960-62) and the Maryland Institute (1963-67), and then Head of Graduate and Undergraduate Painting and Sculpture at the University of Illinois at Urbana-Champaign (1968-69).In 1970 he returned to Mallaig to live and periodically to accompany local fishermen out to sea.