I have noted before the irony of finding our past when building our future. Here in New York one often sees well-preserved advertisements on the sides of buildings for products and services that no longer exist. For Sam’s Snake Oil Cream dial Pennsylvania-72000. Often this happens because an adjacent building, that protected the signage, has been torn down leaving the ad exposed for all to see. Yesterday’s New York Times has the story of the archeological race to gather remnants of the December 1862 Battle of Frederiscksburg while the tractors and backhoes are working away at the same time.