ZG graduated from UPenn in 1896, too early for any contact with EP or WCW there. When I was a grad student at Penn, and too poor to afford a real dentist, a Penn dental student installed a crown "at cost". It's still there 20 years later. It took him most of a semester to complete the work. He was not adept with the hypodermic. On each of my many visits, I would pass on my way in and out of the building a display case devoted to ZG and "painless dentistry". Tim Romano