This post is a follow-up to http://news.ycombinator.com/item?id=2747106 http://news.ycombinator.com/item?id=2747106. The author of http://quoteinvestigator.com

This post is a follow-up to http://news.ycombinator.com/item?id=2747106 http://news.ycombinator.com/item?id=2747106. The author of http://quoteinvestigator.com http://quoteinvestigator.com does a really good job of tracking these things down.