Here is a photo of him at Triangle Workshop:
That is Darby Bannard closely examining a sculpture, while Tony keeps his council directly behind; in 1983 he already has his white hair and beard. Clement Greenberg is the one in the hat, but I can't remember the names of the others. That is me on the left, thinking I was very cool I guess. The photo is courtesy of Cora Kelley Ward, who documented much of that workshop.