I was glad to read Lawrie Challis and Fred Sheard's biographical essay "The Green of Green Functions" (Physics Today, December 2003, page 41) about George Green, the underappreciated mathematician whose function is so widely used. In addition to the Nottingham and Westminster Abbey memorials described in the article, a memorial stained−glass window showing a diagram used for setting up calculations with Green's theorem adorns the dining hall at his Cambridge University college, Gonville & Caius. It was a colorful contribution to my mathematical pilgrimage to England a few years ago.