First, here is more on the late Paul Samuelson courtesy of David Warsh at Economic Principals. Warsh sees Samuelson's Foundations of Economic Analysis and Economics: An Introductory Analysis as part of the pantheon of great economics texts, and lists only four others: Adam Smith's An Inquiry into the Nature and Causes of the Wealth of Nations, David Ricardo's Principles of Political Economy and Taxation, John Stuart Mill's Principles of Political Economy, and Alfred Marshall's Principles of Economics. That's some powerful company.
The second follow-up relates to the post about Russ Roberts and Lord Robert Skidelsky discussing John Maynard Keynes on PBS's NewsHour last week. The original broadcast used only a short amount of the discussion between Roberts and Skidelsky, now you can see the entire conversation which went on for about an hour and a half.
For history of economics geeks, this is about as good as it gets.