As curator of the archives of the Sequoia and Kings Canyon National Parks, Ward Eldredge deliberated what would need to be done if the nearby Castle Fire continued its approach toward the parks’ headquarters. The archives contain the 130-year history of Sequoia, the country’s second-oldest national park. All of it was at risk. As park rangers and other local residents evacuated their homes the afternoon of September 14, Eldredge called Emily Lin, the University of California Merced librarian whom he knew from work digitizing collections from the parks’ archives, and UC Merced staff soon set out on the 150-mile drive to the parks’ headquarters.