Historical records, like the 35.5 million documents and 45,000 maps and sketches that make up the General Land Office Archives, require diligent and careful maintenance to ensure their long term survival. There is a spectrum of intervention when it comes to maintaining archival materials that ranges from "do nothing" to the most rigorous, highly technical work, as seen with the United States Constitution. Preservation, conservation, and restoration are three points on this spectrum.
