 A lifelong educator, he taught at Parsons School of Design, the School of Visual Arts, and at Pratt Institute, and also gave numerous lectures and workshops around the country.A frequent writer on the medium, his column, "Vestal at Large," was a regular feature in "Photo Techniques" magazine, and his books include "The Art of Black and White Enlarging" (1984) and "The Craft of Photography" (1975).Vestal died on December 14, 2013 at his home in Bethlehem, Connecticut.