I thought you might enjoy reading about the tribute Doug Walter’s son created:
http://www.gsusignal.com/campus-life/on-yonder-mountain-an-art-exhibit-by-chris-walter-1.2716623#.T2nGKvF5mSM
When I read this, I remembered seeing some of Anthony Fisher’s work in which his relationship with Alan figured prominently. Chris Walters’ exhibit, however, is not one of us processing the death of one of our parents. It is one of the next generation paying tribute to one of us.